636422701 has 2 divisors, whose sum is σ = 636422702. Its totient is φ = 636422700.

The previous prime is 636422609. The next prime is 636422729. The reversal of 636422701 is 107224636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 463368676 + 173054025 = 21526^2 + 13155^2 .

It is a cyclic number.

It is not a de Polignac number, because 636422701 - 2⁷ = 636422573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (636422791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318211350 + 318211351.

It is an arithmetic number, because the mean of its divisors is an integer number (318211351).

Almost surely, 2^636422701 is an apocalyptic number.

It is an amenable number.

636422701 is a deficient number, since it is larger than the sum of its proper divisors (1).

636422701 is an equidigital number, since it uses as much as digits as its factorization.

636422701 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 31.

The square root of 636422701 is about 25227.4196262717. The cubic root of 636422701 is about 860.1652382153.

The spelling of 636422701 in words is "six hundred thirty-six million, four hundred twenty-two thousand, seven hundred one".