90073997 has 8 divisors (see below), whose sum is σ = 97319040. Its totient is φ = 82874160.

The previous prime is 90073993. The next prime is 90073999. The reversal of 90073997 is 79937009.

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 90073997 - 2² = 90073993 is a prime.

It is a super-2 number, since 2×90073997² = 16226649871112018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90073993) 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, 7097 + ... + 15182.

It is an arithmetic number, because the mean of its divisors is an integer number (12164880).

Almost surely, 2^90073997 is an apocalyptic number.

It is an amenable number.

90073997 is a deficient number, since it is larger than the sum of its proper divisors (7245043).

90073997 is a wasteful number, since it uses less digits than its factorization.

90073997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22603.

The product of its (nonzero) digits is 107163, while the sum is 44.

The square root of 90073997 is about 9490.7321635372. The cubic root of 90073997 is about 448.2632597173.

The spelling of 90073997 in words is "ninety million, seventy-three thousand, nine hundred ninety-seven".