90733789621 has 8 divisors (see below), whose sum is σ = 91857469760. Its totient is φ = 89613952128.

The previous prime is 90733789613. The next prime is 90733789649. The reversal of 90733789621 is 12698733709.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 90733789621 - 2³ = 90733789613 is a prime.

It is the 301221-st Hogben number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90733789691) by changing a digit.

It is a nontrivial repunit in base 301220.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 913131 + ... + 1007608.

It is an arithmetic number, because the mean of its divisors is an integer number (11482183720).

Almost surely, 2^90733789621 is an apocalyptic number.

It is an amenable number.

90733789621 is a deficient number, since it is larger than the sum of its proper divisors (1123680139).

90733789621 is a wasteful number, since it uses less digits than its factorization.

90733789621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1921323.

The product of its (nonzero) digits is 3429216, while the sum is 55.

The spelling of 90733789621 in words is "ninety billion, seven hundred thirty-three million, seven hundred eighty-nine thousand, six hundred twenty-one".