90461731 has 2 divisors, whose sum is σ = 90461732. Its totient is φ = 90461730.

The previous prime is 90461713. The next prime is 90461747. The reversal of 90461731 is 13716409.

It is a happy number.

Together with previous prime (90461713) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90461731 - 2¹⁵ = 90428963 is a prime.

It is a super-2 number, since 2×90461731² = 16366649551032722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90461693 and 90461702.

It is not a weakly prime, because it can be changed into another prime (90461771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45230865 + 45230866.

It is an arithmetic number, because the mean of its divisors is an integer number (45230866).

Almost surely, 2^90461731 is an apocalyptic number.

90461731 is a deficient number, since it is larger than the sum of its proper divisors (1).

90461731 is an equidigital number, since it uses as much as digits as its factorization.

90461731 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 90461731 is about 9511.1372085571. The cubic root of 90461731 is about 448.9055394597.

The spelling of 90461731 in words is "ninety million, four hundred sixty-one thousand, seven hundred thirty-one".