161692799 has 4 divisors (see below), whose sum is σ = 163262736. Its totient is φ = 160122864.

The previous prime is 161692789. The next prime is 161692801. The reversal of 161692799 is 997296161.

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 161692799 - 2²⁴ = 144915583 is a prime.

It is a super-2 number, since 2×161692799² = 52289122496908802, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161692789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 784814 + ... + 785019.

It is an arithmetic number, because the mean of its divisors is an integer number (40815684).

Almost surely, 2^161692799 is an apocalyptic number.

161692799 is a deficient number, since it is larger than the sum of its proper divisors (1569937).

161692799 is a wasteful number, since it uses less digits than its factorization.

161692799 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1569936.

The product of its digits is 367416, while the sum is 50.

The square root of 161692799 is about 12715.8483397688. The cubic root of 161692799 is about 544.7913787832.

The spelling of 161692799 in words is "one hundred sixty-one million, six hundred ninety-two thousand, seven hundred ninety-nine".