90591933877 has 2 divisors, whose sum is σ = 90591933878. Its totient is φ = 90591933876.

The previous prime is 90591933869. The next prime is 90591933907. The reversal of 90591933877 is 77833919509.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 86524810801 + 4067123076 = 294151^2 + 63774^2 .

It is a cyclic number.

It is not a de Polignac number, because 90591933877 - 2³ = 90591933869 is a prime.

It is a super-2 number, since 2×90591933877² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90591933827) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45295966938 + 45295966939.

It is an arithmetic number, because the mean of its divisors is an integer number (45295966939).

Almost surely, 2^90591933877 is an apocalyptic number.

It is an amenable number.

90591933877 is a deficient number, since it is larger than the sum of its proper divisors (1).

90591933877 is an equidigital number, since it uses as much as digits as its factorization.

90591933877 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12859560, while the sum is 61.

The spelling of 90591933877 in words is "ninety billion, five hundred ninety-one million, nine hundred thirty-three thousand, eight hundred seventy-seven".