636299401 has 2 divisors, whose sum is σ = 636299402. Its totient is φ = 636299400.

The previous prime is 636299383. The next prime is 636299413. The reversal of 636299401 is 104992636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 636048400 + 251001 = 25220^2 + 501^2 .

It is a cyclic number.

It is not a de Polignac number, because 636299401 - 2⁵ = 636299369 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (636299431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318149700 + 318149701.

It is an arithmetic number, because the mean of its divisors is an integer number (318149701).

Almost surely, 2^636299401 is an apocalyptic number.

It is an amenable number.

636299401 is a deficient number, since it is larger than the sum of its proper divisors (1).

636299401 is an equidigital number, since it uses as much as digits as its factorization.

636299401 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69984, while the sum is 40.

The square root of 636299401 is about 25224.9757383431. The cubic root of 636299401 is about 860.1096853971.

The spelling of 636299401 in words is "six hundred thirty-six million, two hundred ninety-nine thousand, four hundred one".