7897717172 has 12 divisors (see below), whose sum is σ = 13852206816. Its totient is φ = 3939943800.

The previous prime is 7897717171. The next prime is 7897717193. The reversal of 7897717172 is 2717177987.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7897717171) 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, 2226704 + ... + 2230247.

It is an arithmetic number, because the mean of its divisors is an integer number (1154350568).

Almost surely, 2^7897717172 is an apocalyptic number.

It is an amenable number.

7897717172 is a deficient number, since it is larger than the sum of its proper divisors (5954489644).

7897717172 is a wasteful number, since it uses less digits than its factorization.

7897717172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4457398 (or 4457396 counting only the distinct ones).

The product of its digits is 2420208, while the sum is 56.

The square root of 7897717172 is about 88869.1013344908. The cubic root of 7897717172 is about 1991.4398451458.

The spelling of 7897717172 in words is "seven billion, eight hundred ninety-seven million, seven hundred seventeen thousand, one hundred seventy-two".