63449657 has 2 divisors, whose sum is σ = 63449658. Its totient is φ = 63449656.

The previous prime is 63449623. The next prime is 63449681. The reversal of 63449657 is 75694436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59043856 + 4405801 = 7684^2 + 2099^2 .

It is a cyclic number.

It is not a de Polignac number, because 63449657 - 2¹⁰ = 63448633 is a prime.

It is not a weakly prime, because it can be changed into another prime (63449557) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31724828 + 31724829.

It is an arithmetic number, because the mean of its divisors is an integer number (31724829).

Almost surely, 2^63449657 is an apocalyptic number.

It is an amenable number.

63449657 is a deficient number, since it is larger than the sum of its proper divisors (1).

63449657 is an equidigital number, since it uses as much as digits as its factorization.

63449657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 544320, while the sum is 44.

The square root of 63449657 is about 7965.5292981697. The cubic root of 63449657 is about 398.8501498622.

The spelling of 63449657 in words is "sixty-three million, four hundred forty-nine thousand, six hundred fifty-seven".