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131487272904101 = 193681281206757

131487272904101 has 4 divisors (see below), whose sum is σ = 132168554111052. Its totient is φ = 130805991697152.

The previous prime is 131487272904079. The next prime is 131487272904131. The reversal of 131487272904101 is 101409272784131.

It is a Cunningham number, because it is equal to 114667902+1.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 31857828987076 + 99629443917025 = 5644274^2 + 9981455^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-131487272904101 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 131487272904101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131487272904131) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 340640603186 + ... + 340640603571.

It is an arithmetic number, because the mean of its divisors is an integer number (33042138527763).

Almost surely, 2131487272904101 is an apocalyptic number.

It is an amenable number.

131487272904101 is a deficient number, since it is larger than the sum of its proper divisors (681281206951).

131487272904101 is an equidigital number, since it uses as much as digits as its factorization.

131487272904101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681281206950.

The product of its (nonzero) digits is 677376, while the sum is 50.

The spelling of 131487272904101 in words is "one hundred thirty-one trillion, four hundred eighty-seven billion, two hundred seventy-two million, nine hundred four thousand, one hundred one".

Divisors: 1 193 681281206757 131487272904101