7993254521 has 4 divisors (see below), whose sum is σ = 9135148032. Its totient is φ = 6851361012.

The previous prime is 7993254509. The next prime is 7993254583. The reversal of 7993254521 is 1254523997.

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 a de Polignac number, because none of the positive numbers 2^k-7993254521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7993254121) 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, 570946745 + ... + 570946758.

It is an arithmetic number, because the mean of its divisors is an integer number (2283787008).

Almost surely, 2^7993254521 is an apocalyptic number.

It is an amenable number.

7993254521 is a deficient number, since it is larger than the sum of its proper divisors (1141893511).

7993254521 is a wasteful number, since it uses less digits than its factorization.

7993254521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1141893510.

The product of its digits is 680400, while the sum is 47.

The square root of 7993254521 is about 89405.0027738940. The cubic root of 7993254521 is about 1999.4377186847.

The spelling of 7993254521 in words is "seven billion, nine hundred ninety-three million, two hundred fifty-four thousand, five hundred twenty-one".