2131710779 has 4 divisors (see below), whose sum is σ = 2325502680. Its totient is φ = 1937918880.

The previous prime is 2131710727. The next prime is 2131710781. The reversal of 2131710779 is 9770171312.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2131710779 - 2²⁰ = 2130662203 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131710979) 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, 96895934 + ... + 96895955.

It is an arithmetic number, because the mean of its divisors is an integer number (581375670).

Almost surely, 2^2131710779 is an apocalyptic number.

2131710779 is a deficient number, since it is larger than the sum of its proper divisors (193791901).

2131710779 is a wasteful number, since it uses less digits than its factorization.

2131710779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 193791900.

The product of its (nonzero) digits is 18522, while the sum is 38.

The square root of 2131710779 is about 46170.4535282035. The cubic root of 2131710779 is about 1286.9927302423.

The spelling of 2131710779 in words is "two billion, one hundred thirty-one million, seven hundred ten thousand, seven hundred seventy-nine".