90338873921 has 8 divisors (see below), whose sum is σ = 94276768320. Its totient is φ = 86401822672.

The previous prime is 90338873879. The next prime is 90338873923. The reversal of 90338873921 is 12937883309.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90338873921 is a prime.

It is a super-2 number, since 2×90338873921² (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 (90338873923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13250 + ... + 425268.

It is an arithmetic number, because the mean of its divisors is an integer number (11784596040).

Almost surely, 2^90338873921 is an apocalyptic number.

It is an amenable number.

90338873921 is a deficient number, since it is larger than the sum of its proper divisors (3937894399).

90338873921 is a wasteful number, since it uses less digits than its factorization.

90338873921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 421575.

The product of its (nonzero) digits is 1959552, while the sum is 53.

The spelling of 90338873921 in words is "ninety billion, three hundred thirty-eight million, eight hundred seventy-three thousand, nine hundred twenty-one".