90990113 has 2 divisors, whose sum is σ = 90990114. Its totient is φ = 90990112.

The previous prime is 90990091. The next prime is 90990127. The reversal of 90990113 is 31109909.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 52896529 + 38093584 = 7273^2 + 6172^2 .

It is a cyclic number.

It is not a de Polignac number, because 90990113 - 2⁶ = 90990049 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90990113.

It is not a weakly prime, because it can be changed into another prime (90990013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45495056 + 45495057.

It is an arithmetic number, because the mean of its divisors is an integer number (45495057).

Almost surely, 2^90990113 is an apocalyptic number.

It is an amenable number.

90990113 is a deficient number, since it is larger than the sum of its proper divisors (1).

90990113 is an equidigital number, since it uses as much as digits as its factorization.

90990113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2187, while the sum is 32.

The square root of 90990113 is about 9538.8737804837. The cubic root of 90990113 is about 449.7778541401. Note that the first 3 decimals are identical.

The spelling of 90990113 in words is "ninety million, nine hundred ninety thousand, one hundred thirteen".