168915137 has 4 divisors (see below), whose sum is σ = 172843440. Its totient is φ = 164986836.

The previous prime is 168915119. The next prime is 168915139. The reversal of 168915137 is 731519861.

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 168915137 - 2⁸ = 168914881 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 168915094 and 168915103.

It is not an unprimeable number, because it can be changed into a prime (168915139) 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, 1964087 + ... + 1964172.

It is an arithmetic number, because the mean of its divisors is an integer number (43210860).

Almost surely, 2^168915137 is an apocalyptic number.

It is an amenable number.

168915137 is a deficient number, since it is larger than the sum of its proper divisors (3928303).

168915137 is an equidigital number, since it uses as much as digits as its factorization.

168915137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3928302.

The product of its digits is 45360, while the sum is 41.

The square root of 168915137 is about 12996.7356286107. The cubic root of 168915137 is about 552.7849237795.

The spelling of 168915137 in words is "one hundred sixty-eight million, nine hundred fifteen thousand, one hundred thirty-seven".