90607521 has 8 divisors (see below), whose sum is σ = 120893760. Its totient is φ = 60363152.

The previous prime is 90607507. The next prime is 90607537. The reversal of 90607521 is 12570609.

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 90607521 - 2⁶ = 90607457 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90607541) 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, 5010 + ... + 14363.

It is an arithmetic number, because the mean of its divisors is an integer number (15111720).

Almost surely, 2^90607521 is an apocalyptic number.

It is an amenable number.

90607521 is a deficient number, since it is larger than the sum of its proper divisors (30286239).

90607521 is a wasteful number, since it uses less digits than its factorization.

90607521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20935.

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

The square root of 90607521 is about 9518.7982960035. The cubic root of 90607521 is about 449.1465651815.

The spelling of 90607521 in words is "ninety million, six hundred seven thousand, five hundred twenty-one".