637713113 has 2 divisors, whose sum is σ = 637713114. Its totient is φ = 637713112.

The previous prime is 637713073. The next prime is 637713149. The reversal of 637713113 is 311317736.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 636451984 + 1261129 = 25228^2 + 1123^2 .

It is a cyclic number.

It is not a de Polignac number, because 637713113 - 2²⁰ = 636664537 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 637713113.

It is not a weakly prime, because it can be changed into another prime (637713173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318856556 + 318856557.

It is an arithmetic number, because the mean of its divisors is an integer number (318856557).

Almost surely, 2^637713113 is an apocalyptic number.

It is an amenable number.

637713113 is a deficient number, since it is larger than the sum of its proper divisors (1).

637713113 is an equidigital number, since it uses as much as digits as its factorization.

637713113 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7938, while the sum is 32.

The square root of 637713113 is about 25252.9822595273. The cubic root of 637713113 is about 860.7462033488.

The spelling of 637713113 in words is "six hundred thirty-seven million, seven hundred thirteen thousand, one hundred thirteen".