90160731 has 12 divisors (see below), whose sum is σ = 130889200. Its totient is φ = 59803920.

The previous prime is 90160727. The next prime is 90160747. The reversal of 90160731 is 13706109.

It is not a de Polignac number, because 90160731 - 2² = 90160727 is a prime.

It is a super-2 number, since 2×90160731² = 16257914828908722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90160695 and 90160704.

It is not an unprimeable number, because it can be changed into a prime (90160771) 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 11 ways as a sum of consecutive naturals, for example, 23380 + ... + 26961.

Almost surely, 2^90160731 is an apocalyptic number.

90160731 is a deficient number, since it is larger than the sum of its proper divisors (40728469).

90160731 is a wasteful number, since it uses less digits than its factorization.

90160731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50546 (or 50543 counting only the distinct ones).

The product of its (nonzero) digits is 1134, while the sum is 27.

The square root of 90160731 is about 9495.3004691795. The cubic root of 90160731 is about 448.4070940247.

The spelling of 90160731 in words is "ninety million, one hundred sixty thousand, seven hundred thirty-one".