90947413 has 2 divisors, whose sum is σ = 90947414. Its totient is φ = 90947412.

The previous prime is 90947377. The next prime is 90947429. The reversal of 90947413 is 31474909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 86545809 + 4401604 = 9303^2 + 2098^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90947413 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90947473) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45473706 + 45473707.

It is an arithmetic number, because the mean of its divisors is an integer number (45473707).

Almost surely, 2^90947413 is an apocalyptic number.

It is an amenable number.

90947413 is a deficient number, since it is larger than the sum of its proper divisors (1).

90947413 is an equidigital number, since it uses as much as digits as its factorization.

90947413 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 90947413 is about 9536.6353081158. The cubic root of 90947413 is about 449.7074856177.

The spelling of 90947413 in words is "ninety million, nine hundred forty-seven thousand, four hundred thirteen".