161800373 has 16 divisors (see below), whose sum is σ = 196608384. Its totient is φ = 129984000.

The previous prime is 161800369. The next prime is 161800403. The reversal of 161800373 is 373008161.

It is a cyclic number.

It is not a de Polignac number, because 161800373 - 2² = 161800369 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161800343) 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 15 ways as a sum of consecutive naturals, for example, 27161 + ... + 32577.

It is an arithmetic number, because the mean of its divisors is an integer number (12288024).

Almost surely, 2^161800373 is an apocalyptic number.

It is an amenable number.

161800373 is a deficient number, since it is larger than the sum of its proper divisors (34808011).

161800373 is a wasteful number, since it uses less digits than its factorization.

161800373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5692.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 161800373 is about 12720.0775547950. The cubic root of 161800373 is about 544.9121683221.

The spelling of 161800373 in words is "one hundred sixty-one million, eight hundred thousand, three hundred seventy-three".