161738373 has 4 divisors (see below), whose sum is σ = 215651168. Its totient is φ = 107825580.

The previous prime is 161738371. The next prime is 161738407. The reversal of 161738373 is 373837161.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 161738373 - 2¹ = 161738371 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161738371) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26956393 + ... + 26956398.

It is an arithmetic number, because the mean of its divisors is an integer number (53912792).

Almost surely, 2^161738373 is an apocalyptic number.

It is an amenable number.

161738373 is a deficient number, since it is larger than the sum of its proper divisors (53912795).

161738373 is an equidigital number, since it uses as much as digits as its factorization.

161738373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53912794.

The product of its digits is 63504, while the sum is 39.

The square root of 161738373 is about 12717.6402292249. The cubic root of 161738373 is about 544.8425581187.

The spelling of 161738373 in words is "one hundred sixty-one million, seven hundred thirty-eight thousand, three hundred seventy-three".