90402679137 has 4 divisors (see below), whose sum is σ = 120536905520. Its totient is φ = 60268452756.

The previous prime is 90402679111. The next prime is 90402679189. The reversal of 90402679137 is 73197620409.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 90402679137 - 2⁷ = 90402679009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90402679337) 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, 15067113187 + ... + 15067113192.

It is an arithmetic number, because the mean of its divisors is an integer number (30134226380).

Almost surely, 2^90402679137 is an apocalyptic number.

It is an amenable number.

90402679137 is a deficient number, since it is larger than the sum of its proper divisors (30134226383).

90402679137 is a wasteful number, since it uses less digits than its factorization.

90402679137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30134226382.

The product of its (nonzero) digits is 571536, while the sum is 48.

The spelling of 90402679137 in words is "ninety billion, four hundred two million, six hundred seventy-nine thousand, one hundred thirty-seven".