636250649 has 2 divisors, whose sum is σ = 636250650. Its totient is φ = 636250648.

The previous prime is 636250529. The next prime is 636250757. The reversal of 636250649 is 946052636.

636250649 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 442345024 + 193905625 = 21032^2 + 13925^2 .

It is a cyclic number.

It is not a de Polignac number, because 636250649 - 2⁸ = 636250393 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (636250949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318125324 + 318125325.

It is an arithmetic number, because the mean of its divisors is an integer number (318125325).

Almost surely, 2^636250649 is an apocalyptic number.

It is an amenable number.

636250649 is a deficient number, since it is larger than the sum of its proper divisors (1).

636250649 is an equidigital number, since it uses as much as digits as its factorization.

636250649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 233280, while the sum is 41.

The square root of 636250649 is about 25224.0093759894. The cubic root of 636250649 is about 860.0877182024.

The spelling of 636250649 in words is "six hundred thirty-six million, two hundred fifty thousand, six hundred forty-nine".