90286931 has 16 divisors (see below), whose sum is σ = 105568704. Its totient is φ = 75613824.

The previous prime is 90286907. The next prime is 90286943. The reversal of 90286931 is 13968209.

It is a cyclic number.

It is not a de Polignac number, because 90286931 - 2¹⁰ = 90285907 is a prime.

It is a super-2 number, since 2×90286931² = 16303459818797522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90286951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 146981 + ... + 147593.

It is an arithmetic number, because the mean of its divisors is an integer number (6598044).

Almost surely, 2^90286931 is an apocalyptic number.

90286931 is a deficient number, since it is larger than the sum of its proper divisors (15281773).

90286931 is a wasteful number, since it uses less digits than its factorization.

90286931 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1070.

The product of its (nonzero) digits is 23328, while the sum is 38.

The square root of 90286931 is about 9501.9435380347. The cubic root of 90286931 is about 448.6162116461.

The spelling of 90286931 in words is "ninety million, two hundred eighty-six thousand, nine hundred thirty-one".