8190575921 has 4 divisors (see below), whose sum is σ = 8935173744. Its totient is φ = 7445978100.

The previous prime is 8190575857. The next prime is 8190575941. The reversal of 8190575921 is 1295750918.

It is a happy number.

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 not a de Polignac number, because 8190575921 - 2⁶ = 8190575857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8190575941) 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, 372298895 + ... + 372298916.

It is an arithmetic number, because the mean of its divisors is an integer number (2233793436).

Almost surely, 2^8190575921 is an apocalyptic number.

It is an amenable number.

8190575921 is a deficient number, since it is larger than the sum of its proper divisors (744597823).

8190575921 is a wasteful number, since it uses less digits than its factorization.

8190575921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 744597822.

The product of its (nonzero) digits is 226800, while the sum is 47.

The square root of 8190575921 is about 90501.8006505948. The cubic root of 8190575921 is about 2015.7568614017.

The spelling of 8190575921 in words is "eight billion, one hundred ninety million, five hundred seventy-five thousand, nine hundred twenty-one".