63920481 has 8 divisors (see below), whose sum is σ = 87976704. Its totient is φ = 41238960.

The previous prime is 63920477. The next prime is 63920513. The reversal of 63920481 is 18402936.

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

It is not a de Polignac number, because 63920481 - 2² = 63920477 is a prime.

It is a super-2 number, since 2×63920481² = 8171655782542722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (63920431) 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, 343566 + ... + 343751.

It is an arithmetic number, because the mean of its divisors is an integer number (10997088).

Almost surely, 2^63920481 is an apocalyptic number.

63920481 is the 5057-th centered pentagonal number.

It is an amenable number.

63920481 is a deficient number, since it is larger than the sum of its proper divisors (24056223).

63920481 is a wasteful number, since it uses less digits than its factorization.

63920481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 687351.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 63920481 is about 7995.0285177728. The cubic root of 63920481 is about 399.8342667574.

The spelling of 63920481 in words is "sixty-three million, nine hundred twenty thousand, four hundred eighty-one".