90240909723 has 24 divisors (see below), whose sum is σ = 130726067472. Its totient is φ = 59986363968.

The previous prime is 90240909679. The next prime is 90240909727. The reversal of 90240909723 is 32790904209.

It is not a de Polignac number, because 90240909723 - 2²⁰ = 90239861147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90240909727) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4463265 + ... + 4483437.

It is an arithmetic number, because the mean of its divisors is an integer number (5446919478).

Almost surely, 2^90240909723 is an apocalyptic number.

90240909723 is a deficient number, since it is larger than the sum of its proper divisors (40485157749).

90240909723 is a wasteful number, since it uses less digits than its factorization.

90240909723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21595 (or 21592 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The spelling of 90240909723 in words is "ninety billion, two hundred forty million, nine hundred nine thousand, seven hundred twenty-three".