90475213 has 2 divisors, whose sum is σ = 90475214. Its totient is φ = 90475212.

The previous prime is 90475199. The next prime is 90475237. The reversal of 90475213 is 31257409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46212804 + 44262409 = 6798^2 + 6653^2 .

It is a cyclic number.

It is not a de Polignac number, because 90475213 - 2⁹ = 90474701 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90475313) by changing a digit.

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

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45237606 + 45237607.

It is an arithmetic number, because the mean of its divisors is an integer number (45237607).

Almost surely, 2^90475213 is an apocalyptic number.

It is an amenable number.

90475213 is a deficient number, since it is larger than the sum of its proper divisors (1).

90475213 is an equidigital number, since it uses as much as digits as its factorization.

90475213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7560, while the sum is 31.

The square root of 90475213 is about 9511.8459302072. The cubic root of 90475213 is about 448.9278392903.

The spelling of 90475213 in words is "ninety million, four hundred seventy-five thousand, two hundred thirteen".