90767431 has 2 divisors, whose sum is σ = 90767432. Its totient is φ = 90767430.

The previous prime is 90767393. The next prime is 90767447. The reversal of 90767431 is 13476709.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 90767431 - 2⁹ = 90766919 is a prime.

It is a super-2 number, since 2×90767431² = 16477453060679522, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90767491) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45383715 + 45383716.

It is an arithmetic number, because the mean of its divisors is an integer number (45383716).

Almost surely, 2^90767431 is an apocalyptic number.

90767431 is a deficient number, since it is larger than the sum of its proper divisors (1).

90767431 is an equidigital number, since it uses as much as digits as its factorization.

90767431 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 90767431 is about 9527.1942879318. The cubic root of 90767431 is about 449.4106375057.

The spelling of 90767431 in words is "ninety million, seven hundred sixty-seven thousand, four hundred thirty-one".