637650113 has 2 divisors, whose sum is σ = 637650114. Its totient is φ = 637650112.

The previous prime is 637650107. The next prime is 637650151. The reversal of 637650113 is 311056736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 432931249 + 204718864 = 20807^2 + 14308^2 .

It is a cyclic number.

It is not a de Polignac number, because 637650113 - 2¹² = 637646017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 637650113.

It is not a weakly prime, because it can be changed into another prime (637650613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318825056 + 318825057.

It is an arithmetic number, because the mean of its divisors is an integer number (318825057).

Almost surely, 2^637650113 is an apocalyptic number.

It is an amenable number.

637650113 is a deficient number, since it is larger than the sum of its proper divisors (1).

637650113 is an equidigital number, since it uses as much as digits as its factorization.

637650113 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 637650113 is about 25251.7348512929. The cubic root of 637650113 is about 860.7178578982.

The spelling of 637650113 in words is "six hundred thirty-seven million, six hundred fifty thousand, one hundred thirteen".