90431611 has 2 divisors, whose sum is σ = 90431612. Its totient is φ = 90431610.

The previous prime is 90431587. The next prime is 90431641. The reversal of 90431611 is 11613409.

It is a weak prime.

It is an emirp because it is prime and its reverse (11613409) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90431611 - 2²⁵ = 56877179 is a prime.

It is not a weakly prime, because it can be changed into another prime (90431641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45215805 + 45215806.

It is an arithmetic number, because the mean of its divisors is an integer number (45215806).

Almost surely, 2^90431611 is an apocalyptic number.

90431611 is a deficient number, since it is larger than the sum of its proper divisors (1).

90431611 is an equidigital number, since it uses as much as digits as its factorization.

90431611 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 90431611 is about 9509.5536698627. The cubic root of 90431611 is about 448.8557116278.

The spelling of 90431611 in words is "ninety million, four hundred thirty-one thousand, six hundred eleven".