90902113 has 2 divisors, whose sum is σ = 90902114. Its totient is φ = 90902112.

The previous prime is 90902087. The next prime is 90902131. The reversal of 90902113 is 31120909.

Together with next prime (90902131) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 90763729 + 138384 = 9527^2 + 372^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90902113 is a prime.

It is not a weakly prime, because it can be changed into another prime (90908113) 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, 45451056 + 45451057.

It is an arithmetic number, because the mean of its divisors is an integer number (45451057).

Almost surely, 2^90902113 is an apocalyptic number.

It is an amenable number.

90902113 is a deficient number, since it is larger than the sum of its proper divisors (1).

90902113 is an equidigital number, since it uses as much as digits as its factorization.

90902113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 486, while the sum is 25.

The square root of 90902113 is about 9534.2599607940. The cubic root of 90902113 is about 449.6328082787.

The spelling of 90902113 in words is "ninety million, nine hundred two thousand, one hundred thirteen".