636263149 has 2 divisors, whose sum is σ = 636263150. Its totient is φ = 636263148.

The previous prime is 636263107. The next prime is 636263167. The reversal of 636263149 is 941362636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 606636900 + 29626249 = 24630^2 + 5443^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-636263149 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (636263179) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 318131574 + 318131575.

It is an arithmetic number, because the mean of its divisors is an integer number (318131575).

Almost surely, 2^636263149 is an apocalyptic number.

It is an amenable number.

636263149 is a deficient number, since it is larger than the sum of its proper divisors (1).

636263149 is an equidigital number, since it uses as much as digits as its factorization.

636263149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 40.

The square root of 636263149 is about 25224.2571545725. The cubic root of 636263149 is about 860.0933506923.

The spelling of 636263149 in words is "six hundred thirty-six million, two hundred sixty-three thousand, one hundred forty-nine".