161369259 has 16 divisors (see below), whose sum is σ = 219866400. Its totient is φ = 105238016.

The previous prime is 161369237. The next prime is 161369279. The reversal of 161369259 is 952963161.

It is a cyclic number.

It is not a de Polignac number, because 161369259 - 2⁸ = 161369003 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161369259.

It is not an unprimeable number, because it can be changed into a prime (161369279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60547 + ... + 63155.

It is an arithmetic number, because the mean of its divisors is an integer number (13741650).

Almost surely, 2^161369259 is an apocalyptic number.

161369259 is a deficient number, since it is larger than the sum of its proper divisors (58497141).

161369259 is a wasteful number, since it uses less digits than its factorization.

161369259 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3054.

The product of its digits is 87480, while the sum is 42.

The square root of 161369259 is about 12703.1200498145. The cubic root of 161369259 is about 544.4277684913.

The spelling of 161369259 in words is "one hundred sixty-one million, three hundred sixty-nine thousand, two hundred fifty-nine".