90570621 has 8 divisors (see below), whose sum is σ = 121050720. Its totient is φ = 60235472.

The previous prime is 90570617. The next prime is 90570629. The reversal of 90570621 is 12607509.

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 90570621 - 2² = 90570617 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90570629) 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, 34770 + ... + 37283.

It is an arithmetic number, because the mean of its divisors is an integer number (15131340).

Almost surely, 2^90570621 is an apocalyptic number.

It is an amenable number.

90570621 is a deficient number, since it is larger than the sum of its proper divisors (30480099).

90570621 is a wasteful number, since it uses less digits than its factorization.

90570621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72475.

The product of its (nonzero) digits is 3780, while the sum is 30.

The square root of 90570621 is about 9516.8598287460. The cubic root of 90570621 is about 449.0855851126.

The spelling of 90570621 in words is "ninety million, five hundred seventy thousand, six hundred twenty-one".