131591440679 has 4 divisors (see below), whose sum is σ = 132252704400. Its totient is φ = 130930176960.

The previous prime is 131591440667. The next prime is 131591440691. The reversal of 131591440679 is 976044195131.

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

It is an interprime number because it is at equal distance from previous prime (131591440667) and next prime (131591440691).

It is a cyclic number.

It is not a de Polignac number, because 131591440679 - 2¹⁶ = 131591375143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131591440699) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 330631562 + ... + 330631959.

It is an arithmetic number, because the mean of its divisors is an integer number (33063176100).

Almost surely, 2^131591440679 is an apocalyptic number.

131591440679 is a deficient number, since it is larger than the sum of its proper divisors (661263721).

131591440679 is an equidigital number, since it uses as much as digits as its factorization.

131591440679 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 661263720.

The product of its (nonzero) digits is 816480, while the sum is 50.

The spelling of 131591440679 in words is "one hundred thirty-one billion, five hundred ninety-one million, four hundred forty thousand, six hundred seventy-nine".