90757994 has 16 divisors (see below), whose sum is σ = 142234920. Its totient is φ = 43377600.

The previous prime is 90757981. The next prime is 90758009. The reversal of 90757994 is 49975709.

It can be written as a sum of positive squares in 4 ways, for example, as 78765625 + 11992369 = 8875^2 + 3463^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1889 + ... + 13604.

Almost surely, 2^90757994 is an apocalyptic number.

90757994 is a deficient number, since it is larger than the sum of its proper divisors (51476926).

90757994 is a wasteful number, since it uses less digits than its factorization.

90757994 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15625.

The product of its (nonzero) digits is 714420, while the sum is 50.

The square root of 90757994 is about 9526.6990085758. The cubic root of 90757994 is about 449.3950620394.

The spelling of 90757994 in words is "ninety million, seven hundred fifty-seven thousand, nine hundred ninety-four".