90164087 has 4 divisors (see below), whose sum is σ = 97099800. Its totient is φ = 83228376.

The previous prime is 90164059. The next prime is 90164143. The reversal of 90164087 is 78046109.

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

It is a cyclic number.

It is not a de Polignac number, because 90164087 - 2¹² = 90159991 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 (90164057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3467837 + ... + 3467862.

It is an arithmetic number, because the mean of its divisors is an integer number (24274950).

Almost surely, 2^90164087 is an apocalyptic number.

90164087 is a deficient number, since it is larger than the sum of its proper divisors (6935713).

90164087 is a wasteful number, since it uses less digits than its factorization.

90164087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6935712.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 90164087 is about 9495.4771865347. The cubic root of 90164087 is about 448.4126575537.

The spelling of 90164087 in words is "ninety million, one hundred sixty-four thousand, eighty-seven".