163397090 has 8 divisors (see below), whose sum is σ = 294114780. Its totient is φ = 65358832.

The previous prime is 163397089. The next prime is 163397099. The reversal of 163397090 is 90793361.

It can be written as a sum of positive squares in 2 ways, for example, as 163302841 + 94249 = 12779^2 + 307^2 .

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

It is not an unprimeable number, because it can be changed into a prime (163397099) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 8169845 + ... + 8169864.

Almost surely, 2^163397090 is an apocalyptic number.

163397090 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

163397090 is a deficient number, since it is larger than the sum of its proper divisors (130717690).

163397090 is a wasteful number, since it uses less digits than its factorization.

163397090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16339716.

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 163397090 is about 12782.6871196944. The cubic root of 163397090 is about 546.6987814929.

The spelling of 163397090 in words is "one hundred sixty-three million, three hundred ninety-seven thousand, ninety".