90916389 has 6 divisors (see below), whose sum is σ = 131323686. Its totient is φ = 60610920.

The previous prime is 90916369. The next prime is 90916403. The reversal of 90916389 is 98361909.

90916389 is a `hidden beast` number, since 9 + 0 + 9 + 1 + 638 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 77739489 + 13176900 = 8817^2 + 3630^2 .

It is not a de Polignac number, because 90916389 - 2²⁴ = 74139173 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90916369) 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 in 5 ways as a sum of consecutive naturals, for example, 5050902 + ... + 5050919.

It is an arithmetic number, because the mean of its divisors is an integer number (21887281).

Almost surely, 2^90916389 is an apocalyptic number.

It is an amenable number.

90916389 is a deficient number, since it is larger than the sum of its proper divisors (40407297).

90916389 is a wasteful number, since it uses less digits than its factorization.

90916389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10101827 (or 10101824 counting only the distinct ones).

The product of its (nonzero) digits is 104976, while the sum is 45.

The square root of 90916389 is about 9535.0085998912. The cubic root of 90916389 is about 449.6563450326.

The spelling of 90916389 in words is "ninety million, nine hundred sixteen thousand, three hundred eighty-nine".