7993553997 has 32 divisors (see below), whose sum is σ = 12953162880. Its totient is φ = 4317707520.

The previous prime is 7993553993. The next prime is 7993554001.

It is a happy number.

7993553997 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (7993553993) and next prime (7993554001).

It is not a de Polignac number, because 7993553997 - 2² = 7993553993 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7993553993) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 308818 + ... + 333699.

It is an arithmetic number, because the mean of its divisors is an integer number (404786340).

Almost surely, 2^7993553997 is an apocalyptic number.

It is an amenable number.

7993553997 is a deficient number, since it is larger than the sum of its proper divisors (4959608883).

7993553997 is a wasteful number, since it uses less digits than its factorization.

7993553997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642573.

The product of its digits is 72335025, while the sum is 66.

The square root of 7993553997 is about 89406.6775861848. The cubic root of 7993553997 is about 1999.4626887446.

The spelling of 7993553997 in words is "seven billion, nine hundred ninety-three million, five hundred fifty-three thousand, nine hundred ninety-seven".