161375299 has 4 divisors (see below), whose sum is σ = 164808864. Its totient is φ = 157941736.

The previous prime is 161375297. The next prime is 161375359. The reversal of 161375299 is 992573161.

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

It is a cyclic number.

It is not a de Polignac number, because 161375299 - 2¹ = 161375297 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161375293) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1716712 + ... + 1716805.

It is an arithmetic number, because the mean of its divisors is an integer number (41202216).

Almost surely, 2^161375299 is an apocalyptic number.

161375299 is a deficient number, since it is larger than the sum of its proper divisors (3433565).

161375299 is an equidigital number, since it uses as much as digits as its factorization.

161375299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3433564.

The product of its digits is 102060, while the sum is 43.

The square root of 161375299 is about 12703.3577844600. The cubic root of 161375299 is about 544.4345609926.

The spelling of 161375299 in words is "one hundred sixty-one million, three hundred seventy-five thousand, two hundred ninety-nine".