90452431 has 2 divisors, whose sum is σ = 90452432. Its totient is φ = 90452430.

The previous prime is 90452429. The next prime is 90452471. The reversal of 90452431 is 13425409.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90452431 - 2¹ = 90452429 is a prime.

It is a super-2 number, since 2×90452431² = 16363284547619522, which contains 22 as substring.

Together with 90452429, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90452431.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90452471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45226215 + 45226216.

It is an arithmetic number, because the mean of its divisors is an integer number (45226216).

Almost surely, 2^90452431 is an apocalyptic number.

90452431 is a deficient number, since it is larger than the sum of its proper divisors (1).

90452431 is an equidigital number, since it uses as much as digits as its factorization.

90452431 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 90452431 is about 9510.6482954634. The cubic root of 90452431 is about 448.8901555526.

It can be divided in two parts, 9045 and 2431, that added together give a triangular number (11476 = T₁₅₁).

The spelling of 90452431 in words is "ninety million, four hundred fifty-two thousand, four hundred thirty-one".