63997923 has 8 divisors (see below), whose sum is σ = 93087936. Its totient is φ = 38786600.

The previous prime is 63997873. The next prime is 63997951. The reversal of 63997923 is 32979936.

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 63997923 - 2⁸ = 63997667 is a prime.

It is not an unprimeable number, because it can be changed into a prime (63997993) 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, 969633 + ... + 969698.

It is an arithmetic number, because the mean of its divisors is an integer number (11635992).

Almost surely, 2^63997923 is an apocalyptic number.

63997923 is a deficient number, since it is larger than the sum of its proper divisors (29090013).

63997923 is a wasteful number, since it uses less digits than its factorization.

63997923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1939345.

The product of its digits is 551124, while the sum is 48.

The square root of 63997923 is about 7999.8701864468. The cubic root of 63997923 is about 399.9956728699.

The spelling of 63997923 in words is "sixty-three million, nine hundred ninety-seven thousand, nine hundred twenty-three".