2177997713 has 4 divisors (see below), whose sum is σ = 2178258240. Its totient is φ = 2177737188.

The previous prime is 2177997709. The next prime is 2177997737. The reversal of 2177997713 is 3177997712.

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 not a de Polignac number, because 2177997713 - 2² = 2177997709 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2177997763) 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, 117293 + ... + 134586.

It is an arithmetic number, because the mean of its divisors is an integer number (544564560).

Almost surely, 2^2177997713 is an apocalyptic number.

It is an amenable number.

2177997713 is a deficient number, since it is larger than the sum of its proper divisors (260527).

2177997713 is an equidigital number, since it uses as much as digits as its factorization.

2177997713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260526.

The product of its digits is 1166886, while the sum is 53.

The square root of 2177997713 is about 46669.0230559844. The cubic root of 2177997713 is about 1296.2411564853.

Subtracting 2177997713 from its reverse (3177997712), we obtain a palindrome (999999999).

The spelling of 2177997713 in words is "two billion, one hundred seventy-seven million, nine hundred ninety-seven thousand, seven hundred thirteen".