165017087 has 4 divisors (see below), whose sum is σ = 169041936. Its totient is φ = 160992240.

The previous prime is 165017059. The next prime is 165017089. The reversal of 165017087 is 780710561.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 165017087 - 2¹⁰ = 165016063 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 (165017089) 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, 2012363 + ... + 2012444.

It is an arithmetic number, because the mean of its divisors is an integer number (42260484).

Almost surely, 2^165017087 is an apocalyptic number.

165017087 is a deficient number, since it is larger than the sum of its proper divisors (4024849).

165017087 is an equidigital number, since it uses as much as digits as its factorization.

165017087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4024848.

The product of its (nonzero) digits is 11760, while the sum is 35.

The square root of 165017087 is about 12845.8976720197. The cubic root of 165017087 is about 548.4995876987.

The spelling of 165017087 in words is "one hundred sixty-five million, seventeen thousand, eighty-seven".