63649393 has 2 divisors, whose sum is σ = 63649394. Its totient is φ = 63649392.

The previous prime is 63649319. The next prime is 63649409. The reversal of 63649393 is 39394636.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 47100769 + 16548624 = 6863^2 + 4068^2 .

It is a cyclic number.

It is not a de Polignac number, because 63649393 - 2²¹ = 61552241 is a prime.

It is not a weakly prime, because it can be changed into another prime (63649793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31824696 + 31824697.

It is an arithmetic number, because the mean of its divisors is an integer number (31824697).

Almost surely, 2^63649393 is an apocalyptic number.

It is an amenable number.

63649393 is a deficient number, since it is larger than the sum of its proper divisors (1).

63649393 is an equidigital number, since it uses as much as digits as its factorization.

63649393 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 314928, while the sum is 43.

The square root of 63649393 is about 7978.0569689618. The cubic root of 63649393 is about 399.2682308511.

The spelling of 63649393 in words is "sixty-three million, six hundred forty-nine thousand, three hundred ninety-three".