90615204923 has 4 divisors (see below), whose sum is σ = 90924472128. Its totient is φ = 90305937720.

The previous prime is 90615204919. The next prime is 90615204961. The reversal of 90615204923 is 32940251609.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 90615204923 - 2² = 90615204919 is a prime.

It is a super-2 number, since 2×90615204923² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90615203923) 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, 154633163 + ... + 154633748.

It is an arithmetic number, because the mean of its divisors is an integer number (22731118032).

Almost surely, 2^90615204923 is an apocalyptic number.

90615204923 is a deficient number, since it is larger than the sum of its proper divisors (309267205).

90615204923 is a wasteful number, since it uses less digits than its factorization.

90615204923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309267204.

The product of its (nonzero) digits is 116640, while the sum is 41.

The spelling of 90615204923 in words is "ninety billion, six hundred fifteen million, two hundred four thousand, nine hundred twenty-three".