161597339 has 2 divisors, whose sum is σ = 161597340. Its totient is φ = 161597338.

The previous prime is 161597323. The next prime is 161597347. The reversal of 161597339 is 933795161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161597339 - 2⁴ = 161597323 is a prime.

It is a super-2 number, since 2×161597339² = 52227399943761842, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161597339.

It is not a weakly prime, because it can be changed into another prime (161597239) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80798669 + 80798670.

It is an arithmetic number, because the mean of its divisors is an integer number (80798670).

Almost surely, 2^161597339 is an apocalyptic number.

161597339 is a deficient number, since it is larger than the sum of its proper divisors (1).

161597339 is an equidigital number, since it uses as much as digits as its factorization.

161597339 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 153090, while the sum is 44.

The square root of 161597339 is about 12712.0942019795. The cubic root of 161597339 is about 544.6841465852.

The spelling of 161597339 in words is "one hundred sixty-one million, five hundred ninety-seven thousand, three hundred thirty-nine".