90721333 has 8 divisors (see below), whose sum is σ = 101113920. Its totient is φ = 80890560.

The previous prime is 90721313. The next prime is 90721339. The reversal of 90721333 is 33312709.

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 90721333 - 2¹³ = 90713141 is a prime.

It is a super-2 number, since 2×90721333² = 16460720522593778, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90721339) 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, 140113 + ... + 140758.

It is an arithmetic number, because the mean of its divisors is an integer number (12639240).

Almost surely, 2^90721333 is an apocalyptic number.

It is an amenable number.

90721333 is a deficient number, since it is larger than the sum of its proper divisors (10392587).

90721333 is a wasteful number, since it uses less digits than its factorization.

90721333 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280907.

The product of its (nonzero) digits is 3402, while the sum is 28.

The square root of 90721333 is about 9524.7746954981. The cubic root of 90721333 is about 449.3345439866.

The spelling of 90721333 in words is "ninety million, seven hundred twenty-one thousand, three hundred thirty-three".