90913139788 has 12 divisors (see below), whose sum is σ = 159154895872. Its totient is φ = 45440312400.

The previous prime is 90913139783. The next prime is 90913139789. The reversal of 90913139788 is 88793131909.

It is a happy number.

It is a super-2 number, since 2×90913139788² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (58) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (90913139783) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4051788 + ... + 4074163.

Almost surely, 2^90913139788 is an apocalyptic number.

It is an amenable number.

90913139788 is a deficient number, since it is larger than the sum of its proper divisors (68241756084).

90913139788 is a wasteful number, since it uses less digits than its factorization.

90913139788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8128752 (or 8128750 counting only the distinct ones).

The product of its (nonzero) digits is 2939328, while the sum is 58.

The spelling of 90913139788 in words is "ninety billion, nine hundred thirteen million, one hundred thirty-nine thousand, seven hundred eighty-eight".