163674491 has 8 divisors (see below), whose sum is σ = 166494720. Its totient is φ = 160873128.

The previous prime is 163674481. The next prime is 163674503. The reversal of 163674491 is 194476361.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163674491 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163674431) 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, 13370 + ... + 22496.

It is an arithmetic number, because the mean of its divisors is an integer number (20811840).

Almost surely, 2^163674491 is an apocalyptic number.

163674491 is a deficient number, since it is larger than the sum of its proper divisors (2820229).

163674491 is an equidigital number, since it uses as much as digits as its factorization.

163674491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9433.

The product of its digits is 108864, while the sum is 41.

The square root of 163674491 is about 12793.5331710986. The cubic root of 163674491 is about 547.0079853830.

The spelling of 163674491 in words is "one hundred sixty-three million, six hundred seventy-four thousand, four hundred ninety-one".