90909373 has 2 divisors, whose sum is σ = 90909374. Its totient is φ = 90909372.

The previous prime is 90909367. The next prime is 90909463. The reversal of 90909373 is 37390909.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60637369 + 30272004 = 7787^2 + 5502^2 .

It is a cyclic number.

It is not a de Polignac number, because 90909373 - 2⁹ = 90908861 is a prime.

It is equal to p_5266687 and since 90909373 and 5266687 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90909073) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45454686 + 45454687.

It is an arithmetic number, because the mean of its divisors is an integer number (45454687).

Almost surely, 2^90909373 is an apocalyptic number.

It is an amenable number.

90909373 is a deficient number, since it is larger than the sum of its proper divisors (1).

90909373 is an equidigital number, since it uses as much as digits as its factorization.

90909373 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 45927, while the sum is 40.

The square root of 90909373 is about 9534.6406854165. The cubic root of 90909373 is about 449.6447781042.

The spelling of 90909373 in words is "ninety million, nine hundred nine thousand, three hundred seventy-three".