161389941 has 8 divisors (see below), whose sum is σ = 215288160. Its totient is φ = 107542512.

The previous prime is 161389909. The next prime is 161389961. The reversal of 161389941 is 149983161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161389941 - 2⁵ = 161389909 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 161389893 and 161389902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161389961) 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 7 ways as a sum of consecutive naturals, for example, 4531 + ... + 18528.

It is an arithmetic number, because the mean of its divisors is an integer number (26911020).

Almost surely, 2^161389941 is an apocalyptic number.

It is an amenable number.

161389941 is a deficient number, since it is larger than the sum of its proper divisors (53898219).

161389941 is a wasteful number, since it uses less digits than its factorization.

161389941 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25395.

The product of its digits is 46656, while the sum is 42.

The square root of 161389941 is about 12703.9340757106. The cubic root of 161389941 is about 544.4510264819.

The spelling of 161389941 in words is "one hundred sixty-one million, three hundred eighty-nine thousand, nine hundred forty-one".