63921953 has 8 divisors (see below), whose sum is σ = 65457888. Its totient is φ = 62403264.

The previous prime is 63921941. The next prime is 63921959. The reversal of 63921953 is 35912936.

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

It is not a de Polignac number, because 63921953 - 2⁴ = 63921937 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63921959) 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, 3350 + ... + 11792.

It is an arithmetic number, because the mean of its divisors is an integer number (8182236).

Almost surely, 2^63921953 is an apocalyptic number.

It is an amenable number.

63921953 is a deficient number, since it is larger than the sum of its proper divisors (1535935).

63921953 is a wasteful number, since it uses less digits than its factorization.

63921953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8623.

The product of its digits is 43740, while the sum is 38.

The square root of 63921953 is about 7995.1205744504. The cubic root of 63921953 is about 399.8373359433.

The spelling of 63921953 in words is "sixty-three million, nine hundred twenty-one thousand, nine hundred fifty-three".