63649793 has 2 divisors, whose sum is σ = 63649794. Its totient is φ = 63649792.

The previous prime is 63649771. The next prime is 63649801. The reversal of 63649793 is 39794636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50523664 + 13126129 = 7108^2 + 3623^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63649793 is a prime.

It is a super-2 number, since 2×63649793² = 8102592297885698, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63649723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31824896 + 31824897.

It is an arithmetic number, because the mean of its divisors is an integer number (31824897).

Almost surely, 2^63649793 is an apocalyptic number.

It is an amenable number.

63649793 is a deficient number, since it is larger than the sum of its proper divisors (1).

63649793 is an equidigital number, since it uses as much as digits as its factorization.

63649793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 734832, while the sum is 47.

The square root of 63649793 is about 7978.0820376830. The cubic root of 63649793 is about 399.2690672401.

The spelling of 63649793 in words is "sixty-three million, six hundred forty-nine thousand, seven hundred ninety-three".