90792028987 has 6 divisors (see below), whose sum is σ = 99796197284. Its totient is φ = 82538208060.

The previous prime is 90792028969. The next prime is 90792028997. The reversal of 90792028987 is 78982029709.

It is not a de Polignac number, because 90792028987 - 2¹⁵ = 90791996219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90792028997) 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, 375173553 + ... + 375173794.

Almost surely, 2^90792028987 is an apocalyptic number.

90792028987 is a deficient number, since it is larger than the sum of its proper divisors (9004168297).

90792028987 is a wasteful number, since it uses less digits than its factorization.

90792028987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 750347369 (or 750347358 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 61.

The spelling of 90792028987 in words is "ninety billion, seven hundred ninety-two million, twenty-eight thousand, nine hundred eighty-seven".