90747431 has 2 divisors, whose sum is σ = 90747432. Its totient is φ = 90747430.

The previous prime is 90747403. The next prime is 90747457. The reversal of 90747431 is 13474709.

It is a strong prime.

It is an emirp because it is prime and its reverse (13474709) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90747431 - 2²² = 86553127 is a prime.

It is a super-2 number, since 2×90747431² = 16470192466199522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 90747391 and 90747400.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90747491) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45373715 + 45373716.

It is an arithmetic number, because the mean of its divisors is an integer number (45373716).

Almost surely, 2^90747431 is an apocalyptic number.

90747431 is a deficient number, since it is larger than the sum of its proper divisors (1).

90747431 is an equidigital number, since it uses as much as digits as its factorization.

90747431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21168, while the sum is 35.

The square root of 90747431 is about 9526.1446031435. The cubic root of 90747431 is about 449.3776268656.

The spelling of 90747431 in words is "ninety million, seven hundred forty-seven thousand, four hundred thirty-one".