90504731 has 2 divisors, whose sum is σ = 90504732. Its totient is φ = 90504730.

The previous prime is 90504721. The next prime is 90504749. The reversal of 90504731 is 13740509.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90504731 is a prime.

It is a super-2 number, since 2×90504731² = 16382212666764722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90504694 and 90504703.

It is not a weakly prime, because it can be changed into another prime (90504721) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45252365 + 45252366.

It is an arithmetic number, because the mean of its divisors is an integer number (45252366).

Almost surely, 2^90504731 is an apocalyptic number.

90504731 is a deficient number, since it is larger than the sum of its proper divisors (1).

90504731 is an equidigital number, since it uses as much as digits as its factorization.

90504731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 90504731 is about 9513.3974478101. The cubic root of 90504731 is about 448.9766556481.

The spelling of 90504731 in words is "ninety million, five hundred four thousand, seven hundred thirty-one".