63173923 has 4 divisors (see below), whose sum is σ = 64643128. Its totient is φ = 61704720.

The previous prime is 63173909. The next prime is 63173947. The reversal of 63173923 is 32937136.

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 63173923 - 2¹³ = 63165731 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (63173953) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 734538 + ... + 734623.

It is an arithmetic number, because the mean of its divisors is an integer number (16160782).

Almost surely, 2^63173923 is an apocalyptic number.

63173923 is a deficient number, since it is larger than the sum of its proper divisors (1469205).

63173923 is a wasteful number, since it uses less digits than its factorization.

63173923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1469204.

The product of its digits is 20412, while the sum is 34.

The square root of 63173923 is about 7948.2025011948. The cubic root of 63173923 is about 398.2715481434.

The spelling of 63173923 in words is "sixty-three million, one hundred seventy-three thousand, nine hundred twenty-three".