90624089 has 2 divisors, whose sum is σ = 90624090. Its totient is φ = 90624088.

The previous prime is 90624049. The next prime is 90624103. The reversal of 90624089 is 98042609.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 89624089 + 1000000 = 9467^2 + 1000^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90624089 is a prime.

It is not a weakly prime, because it can be changed into another prime (90624019) 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, 45312044 + 45312045.

It is an arithmetic number, because the mean of its divisors is an integer number (45312045).

Almost surely, 2^90624089 is an apocalyptic number.

It is an amenable number.

90624089 is a deficient number, since it is larger than the sum of its proper divisors (1).

90624089 is an equidigital number, since it uses as much as digits as its factorization.

90624089 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 90624089 is about 9519.6685341455. The cubic root of 90624089 is about 449.1739396816.

The spelling of 90624089 in words is "ninety million, six hundred twenty-four thousand, eighty-nine".