2113713857 has 2 divisors, whose sum is σ = 2113713858. Its totient is φ = 2113713856.

The previous prime is 2113713841. The next prime is 2113713859. The reversal of 2113713857 is 7583173112.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1781599681 + 332114176 = 42209^2 + 18224^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113713857 - 2⁴ = 2113713841 is a prime.

Together with 2113713859, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 2113713857.

It is not a weakly prime, because it can be changed into another prime (2113713859) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056856928 + 1056856929.

It is an arithmetic number, because the mean of its divisors is an integer number (1056856929).

Almost surely, 2^2113713857 is an apocalyptic number.

It is an amenable number.

2113713857 is a deficient number, since it is larger than the sum of its proper divisors (1).

2113713857 is an equidigital number, since it uses as much as digits as its factorization.

2113713857 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 38.

The square root of 2113713857 is about 45975.1439040706. The cubic root of 2113713857 is about 1283.3606871027.

Adding to 2113713857 its reverse (7583173112), we get a palindrome (9696886969).

The spelling of 2113713857 in words is "two billion, one hundred thirteen million, seven hundred thirteen thousand, eight hundred fifty-seven".