63420899 has 4 divisors (see below), whose sum is σ = 63905160. Its totient is φ = 62936640.

The previous prime is 63420893. The next prime is 63420937. The reversal of 63420899 is 99802436.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 63420899 - 2²⁴ = 46643683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63420893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 241934 + ... + 242195.

It is an arithmetic number, because the mean of its divisors is an integer number (15976290).

Almost surely, 2^63420899 is an apocalyptic number.

63420899 is a deficient number, since it is larger than the sum of its proper divisors (484261).

63420899 is a wasteful number, since it uses less digits than its factorization.

63420899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 484260.

The product of its (nonzero) digits is 93312, while the sum is 41.

The square root of 63420899 is about 7963.7239404691. The cubic root of 63420899 is about 398.7898823131.

The spelling of 63420899 in words is "sixty-three million, four hundred twenty thousand, eight hundred ninety-nine".