90161967 has 16 divisors (see below), whose sum is σ = 139442432. Its totient is φ = 50751360.

The previous prime is 90161921. The next prime is 90161969. The reversal of 90161967 is 76916109.

It is not a de Polignac number, because 90161967 - 2¹⁶ = 90096431 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 (90161969) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30634 + ... + 33447.

It is an arithmetic number, because the mean of its divisors is an integer number (8715152).

Almost surely, 2^90161967 is an apocalyptic number.

90161967 is a deficient number, since it is larger than the sum of its proper divisors (49280465).

90161967 is a wasteful number, since it uses less digits than its factorization.

90161967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64158.

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 90161967 is about 9495.3655537846. The cubic root of 90161967 is about 448.4091430640.

The spelling of 90161967 in words is "ninety million, one hundred sixty-one thousand, nine hundred sixty-seven".