90329131877 has 6 divisors (see below), whose sum is σ = 90470389734. Its totient is φ = 90187897800.

The previous prime is 90329131859. The next prime is 90329131883. The reversal of 90329131877 is 77813192309.

It can be written as a sum of positive squares in only one way, i.e., 90195706276 + 133425601 = 300326^2 + 11551^2 .

It is not a de Polignac number, because 90329131877 - 2⁶ = 90329131813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90329131897) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7814252 + ... + 7825802.

It is an arithmetic number, because the mean of its divisors is an integer number (15078398289).

Almost surely, 2^90329131877 is an apocalyptic number.

It is an amenable number.

90329131877 is a deficient number, since it is larger than the sum of its proper divisors (141257857).

90329131877 is an frugal number, since it uses more digits than its factorization.

90329131877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23779 (or 12228 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 50.

The spelling of 90329131877 in words is "ninety billion, three hundred twenty-nine million, one hundred thirty-one thousand, eight hundred seventy-seven".