63942809 has 8 divisors (see below), whose sum is σ = 76923840. Its totient is φ = 51923376.

The previous prime is 63942799. The next prime is 63942811. The reversal of 63942809 is 90824936.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 63942809 - 2²⁴ = 47165593 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63942839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 240254 + ... + 240519.

It is an arithmetic number, because the mean of its divisors is an integer number (9615480).

Almost surely, 2^63942809 is an apocalyptic number.

It is an amenable number.

63942809 is a deficient number, since it is larger than the sum of its proper divisors (12981031).

63942809 is a wasteful number, since it uses less digits than its factorization.

63942809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 480799.

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

The square root of 63942809 is about 7996.4247636053. The cubic root of 63942809 is about 399.8808165751.

The spelling of 63942809 in words is "sixty-three million, nine hundred forty-two thousand, eight hundred nine".