161189699 has 8 divisors (see below), whose sum is σ = 186187248. Its totient is φ = 137916160.

The previous prime is 161189689. The next prime is 161189729. The reversal of 161189699 is 996981161.

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

It is a cyclic number.

It is not a de Polignac number, because 161189699 - 2⁴ = 161189683 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161189659) 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, 430802 + ... + 431175.

It is an arithmetic number, because the mean of its divisors is an integer number (23273406).

Almost surely, 2^161189699 is an apocalyptic number.

161189699 is a deficient number, since it is larger than the sum of its proper divisors (24997549).

161189699 is a wasteful number, since it uses less digits than its factorization.

161189699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 862005.

The product of its digits is 209952, while the sum is 50.

The square root of 161189699 is about 12696.0505276247. The cubic root of 161189699 is about 544.2257603099.

The spelling of 161189699 in words is "one hundred sixty-one million, one hundred eighty-nine thousand, six hundred ninety-nine".