161842973 has 16 divisors (see below), whose sum is σ = 173871360. Its totient is φ = 150294144.

The previous prime is 161842937. The next prime is 161842987. The reversal of 161842973 is 379248161.

161842973 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 161842973 - 2¹⁸ = 161580829 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 161842973.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161844973) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 124913 + ... + 126201.

It is an arithmetic number, because the mean of its divisors is an integer number (10866960).

Almost surely, 2^161842973 is an apocalyptic number.

It is an amenable number.

161842973 is a deficient number, since it is larger than the sum of its proper divisors (12028387).

161842973 is a wasteful number, since it uses less digits than its factorization.

161842973 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468.

The product of its digits is 72576, while the sum is 41.

The square root of 161842973 is about 12721.7519626819. The cubic root of 161842973 is about 544.9599869622.

The spelling of 161842973 in words is "one hundred sixty-one million, eight hundred forty-two thousand, nine hundred seventy-three".