63155399 has 2 divisors, whose sum is σ = 63155400. Its totient is φ = 63155398.

The previous prime is 63155371. The next prime is 63155413. The reversal of 63155399 is 99355136.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63155399 - 2⁸ = 63155143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63155329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31577699 + 31577700.

It is an arithmetic number, because the mean of its divisors is an integer number (31577700).

Almost surely, 2^63155399 is an apocalyptic number.

63155399 is a deficient number, since it is larger than the sum of its proper divisors (1).

63155399 is an equidigital number, since it uses as much as digits as its factorization.

63155399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 109350, while the sum is 41.

The square root of 63155399 is about 7947.0371208394. The cubic root of 63155399 is about 398.2326169779.

The spelling of 63155399 in words is "sixty-three million, one hundred fifty-five thousand, three hundred ninety-nine".