90159867 has 24 divisors (see below), whose sum is σ = 149108960. Its totient is φ = 51425280.

The previous prime is 90159841. The next prime is 90159871. The reversal of 90159867 is 76895109.

It is not a de Polignac number, because 90159867 - 2¹⁰ = 90158843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90159877) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 47517 + ... + 49377.

Almost surely, 2^90159867 is an apocalyptic number.

90159867 is a deficient number, since it is larger than the sum of its proper divisors (58949093).

90159867 is a wasteful number, since it uses less digits than its factorization.

90159867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2643 (or 2640 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 90159867 is about 9495.2549728799. The cubic root of 90159867 is about 448.4056616755.

The spelling of 90159867 in words is "ninety million, one hundred fifty-nine thousand, eight hundred sixty-seven".