136497881 has 16 divisors (see below), whose sum is σ = 155568000. Its totient is φ = 118723968.

The previous prime is 136497877. The next prime is 136497901. The reversal of 136497881 is 188794631.

It is a cyclic number.

It is not a de Polignac number, because 136497881 - 2² = 136497877 is a prime.

It is a super-2 number, since 2×136497881² = 37263343034980322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (136497871) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 47765 + ... + 50541.

It is an arithmetic number, because the mean of its divisors is an integer number (9723000).

Almost surely, 2^136497881 is an apocalyptic number.

It is an amenable number.

136497881 is a deficient number, since it is larger than the sum of its proper divisors (19070119).

136497881 is a wasteful number, since it uses less digits than its factorization.

136497881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3008.

The product of its digits is 290304, while the sum is 47.

The square root of 136497881 is about 11683.2307603676. The cubic root of 136497881 is about 514.8830991145.

The spelling of 136497881 in words is "one hundred thirty-six million, four hundred ninety-seven thousand, eight hundred eighty-one".