63456749 has 2 divisors, whose sum is σ = 63456750. Its totient is φ = 63456748.

The previous prime is 63456719. The next prime is 63456761. The reversal of 63456749 is 94765436.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 63282025 + 174724 = 7955^2 + 418^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63456749 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63456709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31728374 + 31728375.

It is an arithmetic number, because the mean of its divisors is an integer number (31728375).

Almost surely, 2^63456749 is an apocalyptic number.

It is an amenable number.

63456749 is a deficient number, since it is larger than the sum of its proper divisors (1).

63456749 is an equidigital number, since it uses as much as digits as its factorization.

63456749 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 63456749 is about 7965.9744538882. The cubic root of 63456749 is about 398.8650096215.

The spelling of 63456749 in words is "sixty-three million, four hundred fifty-six thousand, seven hundred forty-nine".