163139593 has 4 divisors (see below), whose sum is σ = 163190548. Its totient is φ = 163088640.

The previous prime is 163139563. The next prime is 163139609. The reversal of 163139593 is 395931361.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 104203264 + 58936329 = 10208^2 + 7677^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-163139593 is a prime.

It is a super-2 number, since 2×163139593² = 53229053608411298, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (163139513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20328 + ... + 27193.

It is an arithmetic number, because the mean of its divisors is an integer number (40797637).

Almost surely, 2^163139593 is an apocalyptic number.

It is an amenable number.

163139593 is a deficient number, since it is larger than the sum of its proper divisors (50955).

163139593 is an equidigital number, since it uses as much as digits as its factorization.

163139593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50954.

The product of its digits is 65610, while the sum is 40.

The square root of 163139593 is about 12772.6110486462. The cubic root of 163139593 is about 546.4114501640.

The spelling of 163139593 in words is "one hundred sixty-three million, one hundred thirty-nine thousand, five hundred ninety-three".