63420919 has 4 divisors (see below), whose sum is σ = 63470896. Its totient is φ = 63370944.

The previous prime is 63420893. The next prime is 63420937. The reversal of 63420919 is 91902436.

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 63420919 - 2¹⁵ = 63388151 is a prime.

It is a super-2 number, since 2×63420919² = 8044425933609122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (63420949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23034 + ... + 25639.

It is an arithmetic number, because the mean of its divisors is an integer number (15867724).

Almost surely, 2^63420919 is an apocalyptic number.

63420919 is a deficient number, since it is larger than the sum of its proper divisors (49977).

63420919 is a wasteful number, since it uses less digits than its factorization.

63420919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49976.

The product of its (nonzero) digits is 11664, while the sum is 34.

The square root of 63420919 is about 7963.7251961629. The cubic root of 63420919 is about 398.7899242330.

The spelling of 63420919 in words is "sixty-three million, four hundred twenty thousand, nine hundred nineteen".