165937087 has 4 divisors (see below), whose sum is σ = 168749640. Its totient is φ = 163124536.

The previous prime is 165937073. The next prime is 165937139. The reversal of 165937087 is 780739561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 780739561 = 7 ⋅111534223.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-165937087 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 (165937007) 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, 1406188 + ... + 1406305.

It is an arithmetic number, because the mean of its divisors is an integer number (42187410).

Almost surely, 2^165937087 is an apocalyptic number.

165937087 is a deficient number, since it is larger than the sum of its proper divisors (2812553).

165937087 is an equidigital number, since it uses as much as digits as its factorization.

165937087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2812552.

The product of its (nonzero) digits is 317520, while the sum is 46.

The square root of 165937087 is about 12881.6569974518. The cubic root of 165937087 is about 549.5170272499.

The spelling of 165937087 in words is "one hundred sixty-five million, nine hundred thirty-seven thousand, eighty-seven".