163920375 has 64 divisors (see below), whose sum is σ = 321010560. Its totient is φ = 82252800.

The previous prime is 163920331. The next prime is 163920401. The reversal of 163920375 is 573029361.

It is not a de Polignac number, because 163920375 - 2⁶ = 163920311 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 55947 + ... + 58803.

It is an arithmetic number, because the mean of its divisors is an integer number (5015790).

Almost surely, 2^163920375 is an apocalyptic number.

163920375 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

163920375 is a deficient number, since it is larger than the sum of its proper divisors (157090185).

163920375 is a wasteful number, since it uses less digits than its factorization.

163920375 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2898 (or 2882 counting only the distinct ones).

The product of its (nonzero) digits is 34020, while the sum is 36.

The square root of 163920375 is about 12803.1392634775. The cubic root of 163920375 is about 547.2817670305.

The spelling of 163920375 in words is "one hundred sixty-three million, nine hundred twenty thousand, three hundred seventy-five".