163397979 has 30 divisors (see below), whose sum is σ = 250125876. Its totient is φ = 106301160.

The previous prime is 163397959. The next prime is 163397989. The reversal of 163397979 is 979793361.

163397979 is a `hidden beast` number, since 163 + 397 + 97 + 9 = 666.

It is not a de Polignac number, because 163397979 - 2⁷ = 163397851 is a prime.

It is not an unprimeable number, because it can be changed into a prime (163397959) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 149224 + ... + 150314.

Almost surely, 2^163397979 is an apocalyptic number.

163397979 is a deficient number, since it is larger than the sum of its proper divisors (86727897).

163397979 is an equidigital number, since it uses as much as digits as its factorization.

163397979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1189 (or 1137 counting only the distinct ones).

The product of its digits is 1928934, while the sum is 54.

The square root of 163397979 is about 12782.7218932432. The cubic root of 163397979 is about 546.6997729719.

The spelling of 163397979 in words is "one hundred sixty-three million, three hundred ninety-seven thousand, nine hundred seventy-nine".