90352731 has 16 divisors (see below), whose sum is σ = 137832704. Its totient is φ = 51573024.

The previous prime is 90352729. The next prime is 90352747. The reversal of 90352731 is 13725309.

It is not a de Polignac number, because 90352731 - 2¹ = 90352729 is a prime.

It is a super-2 number, since 2×90352731² = 16327231998316722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90352781) 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, 23700 + ... + 27246.

It is an arithmetic number, because the mean of its divisors is an integer number (8614544).

Almost surely, 2^90352731 is an apocalyptic number.

90352731 is a deficient number, since it is larger than the sum of its proper divisors (47479973).

90352731 is a wasteful number, since it uses less digits than its factorization.

90352731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4770.

The product of its (nonzero) digits is 5670, while the sum is 30.

The square root of 90352731 is about 9505.4053569535. The cubic root of 90352731 is about 448.7251671663.

The spelling of 90352731 in words is "ninety million, three hundred fifty-two thousand, seven hundred thirty-one".