131685061 has 4 divisors (see below), whose sum is σ = 133271712. Its totient is φ = 130098412.

The previous prime is 131685017. The next prime is 131685079. The reversal of 131685061 is 160586131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 131685061 - 2⁷ = 131684933 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 (131685361) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 793201 + ... + 793366.

It is an arithmetic number, because the mean of its divisors is an integer number (33317928).

Almost surely, 2^131685061 is an apocalyptic number.

It is an amenable number.

131685061 is a deficient number, since it is larger than the sum of its proper divisors (1586651).

131685061 is an equidigital number, since it uses as much as digits as its factorization.

131685061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1586650.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 131685061 is about 11475.4111473184. The cubic root of 131685061 is about 508.7590758361.

The spelling of 131685061 in words is "one hundred thirty-one million, six hundred eighty-five thousand, sixty-one".