161804079 has 24 divisors (see below), whose sum is σ = 256005360. Its totient is φ = 98020608.

The previous prime is 161804077. The next prime is 161804089. The reversal of 161804079 is 970408161.

It is not a de Polignac number, because 161804079 - 2¹ = 161804077 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161804077) 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 23 ways as a sum of consecutive naturals, for example, 13797 + ... + 22670.

It is an arithmetic number, because the mean of its divisors is an integer number (10666890).

Almost surely, 2^161804079 is an apocalyptic number.

161804079 is a deficient number, since it is larger than the sum of its proper divisors (94201281).

161804079 is a wasteful number, since it uses less digits than its factorization.

161804079 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36519 (or 36516 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 161804079 is about 12720.2232291733. The cubic root of 161804079 is about 544.9163286526.

The spelling of 161804079 in words is "one hundred sixty-one million, eight hundred four thousand, seventy-nine".