131673601 has 4 divisors (see below), whose sum is σ = 136214100. Its totient is φ = 127133104.

The previous prime is 131673583. The next prime is 131673613. The reversal of 131673601 is 106376131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 106376131 = 61 ⋅1743871.

It can be written as a sum of positive squares in 2 ways, for example, as 91680625 + 39992976 = 9575^2 + 6324^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-131673601 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 131673601.

It is not an unprimeable number, because it can be changed into a prime (131673301) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2270206 + ... + 2270263.

It is an arithmetic number, because the mean of its divisors is an integer number (34053525).

Almost surely, 2^131673601 is an apocalyptic number.

It is an amenable number.

131673601 is a deficient number, since it is larger than the sum of its proper divisors (4540499).

131673601 is an equidigital number, since it uses as much as digits as its factorization.

131673601 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4540498.

The product of its (nonzero) digits is 2268, while the sum is 28.

The square root of 131673601 is about 11474.9118079400. The cubic root of 131673601 is about 508.7443170166.

The spelling of 131673601 in words is "one hundred thirty-one million, six hundred seventy-three thousand, six hundred one".