63449689 has 2 divisors, whose sum is σ = 63449690. Its totient is φ = 63449688.

The previous prime is 63449681. The next prime is 63449753. The reversal of 63449689 is 98694436.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63441225 + 8464 = 7965^2 + 92^2 .

It is a cyclic number.

It is not a de Polignac number, because 63449689 - 2³ = 63449681 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63449681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31724844 + 31724845.

It is an arithmetic number, because the mean of its divisors is an integer number (31724845).

Almost surely, 2^63449689 is an apocalyptic number.

It is an amenable number.

63449689 is a deficient number, since it is larger than the sum of its proper divisors (1).

63449689 is an equidigital number, since it uses as much as digits as its factorization.

63449689 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1119744, while the sum is 49.

The square root of 63449689 is about 7965.5313068244. The cubic root of 63449689 is about 398.8502169138.

The spelling of 63449689 in words is "sixty-three million, four hundred forty-nine thousand, six hundred eighty-nine".