90327731 has 16 divisors (see below), whose sum is σ = 99173760. Its totient is φ = 81768960.

The previous prime is 90327719. The next prime is 90327733. The reversal of 90327731 is 13772309.

It is not a de Polignac number, because 90327731 - 2¹⁰ = 90326707 is a prime.

It is a super-2 number, since 2×90327731² = 16318197975216722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90327733) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 288431 + ... + 288743.

It is an arithmetic number, because the mean of its divisors is an integer number (6198360).

Almost surely, 2^90327731 is an apocalyptic number.

90327731 is a deficient number, since it is larger than the sum of its proper divisors (8846029).

90327731 is a wasteful number, since it uses less digits than its factorization.

90327731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 686.

The product of its (nonzero) digits is 7938, while the sum is 32.

The square root of 90327731 is about 9504.0902247401. The cubic root of 90327731 is about 448.6837769251.

The spelling of 90327731 in words is "ninety million, three hundred twenty-seven thousand, seven hundred thirty-one".