63811249 has 2 divisors, whose sum is σ = 63811250. Its totient is φ = 63811248.

The previous prime is 63811219. The next prime is 63811259. The reversal of 63811249 is 94211836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32001649 + 31809600 = 5657^2 + 5640^2 .

It is a cyclic number.

It is not a de Polignac number, because 63811249 - 2⁹ = 63810737 is a prime.

It is not a weakly prime, because it can be changed into another prime (63811219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31905624 + 31905625.

It is an arithmetic number, because the mean of its divisors is an integer number (31905625).

Almost surely, 2^63811249 is an apocalyptic number.

It is an amenable number.

63811249 is a deficient number, since it is larger than the sum of its proper divisors (1).

63811249 is an equidigital number, since it uses as much as digits as its factorization.

63811249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 34.

The square root of 63811249 is about 7988.1943516667. The cubic root of 63811249 is about 399.6063815383.

The spelling of 63811249 in words is "sixty-three million, eight hundred eleven thousand, two hundred forty-nine".