90567521 has 4 divisors (see below), whose sum is σ = 98800944. Its totient is φ = 82334100.

The previous prime is 90567511. The next prime is 90567541. The reversal of 90567521 is 12576509.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90567521 - 2⁶ = 90567457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90567511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4116695 + ... + 4116716.

It is an arithmetic number, because the mean of its divisors is an integer number (24700236).

Almost surely, 2^90567521 is an apocalyptic number.

It is an amenable number.

90567521 is a deficient number, since it is larger than the sum of its proper divisors (8233423).

90567521 is a wasteful number, since it uses less digits than its factorization.

90567521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8233422.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 90567521 is about 9516.6969585040. The cubic root of 90567521 is about 449.0804613716.

The spelling of 90567521 in words is "ninety million, five hundred sixty-seven thousand, five hundred twenty-one".