163860975 has 72 divisors (see below), whose sum is σ = 313018160. Its totient is φ = 85030560.

The previous prime is 163860967. The next prime is 163860979. The reversal of 163860975 is 579068361.

It is a happy number.

163860975 is a `hidden beast` number, since 1 + 6 + 38 + 609 + 7 + 5 = 666.

It is not a de Polignac number, because 163860975 - 2³ = 163860967 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 163860975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (163860979) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 4428657 + ... + 4428693.

Almost surely, 2^163860975 is an apocalyptic number.

163860975 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

163860975 is a deficient number, since it is larger than the sum of its proper divisors (149157185).

163860975 is an frugal number, since it uses more digits than its factorization.

163860975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80 (or 45 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 163860975 is about 12800.8193097161. The cubic root of 163860975 is about 547.2156526859.

The spelling of 163860975 in words is "one hundred sixty-three million, eight hundred sixty thousand, nine hundred seventy-five".