90254431 has 2 divisors, whose sum is σ = 90254432. Its totient is φ = 90254430.

The previous prime is 90254413. The next prime is 90254447. The reversal of 90254431 is 13445209.

Together with previous prime (90254413) 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 90254431 - 2⁵ = 90254399 is a prime.

It is a super-2 number, since 2×90254431² = 16291724630267522, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 90254431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90264431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45127215 + 45127216.

It is an arithmetic number, because the mean of its divisors is an integer number (45127216).

Almost surely, 2^90254431 is an apocalyptic number.

90254431 is a deficient number, since it is larger than the sum of its proper divisors (1).

90254431 is an equidigital number, since it uses as much as digits as its factorization.

90254431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 90254431 is about 9500.2332076639. The cubic root of 90254431 is about 448.5623766983.

It can be divided in two parts, 9025 and 4431, that added together give a square (13456 = 116²).

The spelling of 90254431 in words is "ninety million, two hundred fifty-four thousand, four hundred thirty-one".