161849099 has 8 divisors (see below), whose sum is σ = 166286400. Its totient is φ = 157435200.

The previous prime is 161849089. The next prime is 161849101. The reversal of 161849099 is 990948161.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161849099 is a prime.

It is a super-2 number, since 2×161849099² = 52390261694223602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161849069) 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, 8654 + ... + 19964.

It is an arithmetic number, because the mean of its divisors is an integer number (20785800).

Almost surely, 2^161849099 is an apocalyptic number.

161849099 is a deficient number, since it is larger than the sum of its proper divisors (4437301).

161849099 is a wasteful number, since it uses less digits than its factorization.

161849099 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11701.

The product of its (nonzero) digits is 139968, while the sum is 47.

The square root of 161849099 is about 12721.9927291286. The cubic root of 161849099 is about 544.9668627272.

The spelling of 161849099 in words is "one hundred sixty-one million, eight hundred forty-nine thousand, ninety-nine".