90731967827 has 4 divisors (see below), whose sum is σ = 90732742320. Its totient is φ = 90731193336.

The previous prime is 90731967797. The next prime is 90731967829. The reversal of 90731967827 is 72876913709.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 90731967827 - 2⁶ = 90731967763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90731967829) 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, 171428 + ... + 459185.

It is an arithmetic number, because the mean of its divisors is an integer number (22683185580).

Almost surely, 2^90731967827 is an apocalyptic number.

90731967827 is a deficient number, since it is larger than the sum of its proper divisors (774493).

90731967827 is a wasteful number, since it uses less digits than its factorization.

90731967827 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 774492.

The product of its (nonzero) digits is 8001504, while the sum is 59.

The spelling of 90731967827 in words is "ninety billion, seven hundred thirty-one million, nine hundred sixty-seven thousand, eight hundred twenty-seven".