7939553997 has 8 divisors (see below), whose sum is σ = 11143233760. Its totient is φ = 5014455120.

The previous prime is 7939553989. The next prime is 7939554001. The reversal of 7939553997 is 7993559397.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 7939553997 - 2³ = 7939553989 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7939553917) 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, 69645154 + ... + 69645267.

It is an arithmetic number, because the mean of its divisors is an integer number (1392904220).

Almost surely, 2^7939553997 is an apocalyptic number.

It is an amenable number.

7939553997 is a deficient number, since it is larger than the sum of its proper divisors (3203679763).

7939553997 is a wasteful number, since it uses less digits than its factorization.

7939553997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139290443.

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

The square root of 7939553997 is about 89104.1749695265. The cubic root of 7939553997 is about 1994.9500930349.

The spelling of 7939553997 in words is "seven billion, nine hundred thirty-nine million, five hundred fifty-three thousand, nine hundred ninety-seven".