90469889 has 2 divisors, whose sum is σ = 90469890. Its totient is φ = 90469888.

The previous prime is 90469871. The next prime is 90469927. The reversal of 90469889 is 98896409.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 88981489 + 1488400 = 9433^2 + 1220^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90469889 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90469889.

It is not a weakly prime, because it can be changed into another prime (90469829) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45234944 + 45234945.

It is an arithmetic number, because the mean of its divisors is an integer number (45234945).

Almost surely, 2^90469889 is an apocalyptic number.

It is an amenable number.

90469889 is a deficient number, since it is larger than the sum of its proper divisors (1).

90469889 is an equidigital number, since it uses as much as digits as its factorization.

90469889 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1119744, while the sum is 53.

The square root of 90469889 is about 9511.5660645343. The cubic root of 90469889 is about 448.9190334211.

The spelling of 90469889 in words is "ninety million, four hundred sixty-nine thousand, eight hundred eighty-nine".