161392139 has 2 divisors, whose sum is σ = 161392140. Its totient is φ = 161392138.

The previous prime is 161392097. The next prime is 161392141. The reversal of 161392139 is 931293161.

161392139 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161392139 - 2²⁴ = 144614923 is a prime.

It is a Sophie Germain prime.

Together with 161392141, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 161392099 and 161392108.

It is not a weakly prime, because it can be changed into another prime (161392739) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80696069 + 80696070.

It is an arithmetic number, because the mean of its divisors is an integer number (80696070).

Almost surely, 2^161392139 is an apocalyptic number.

161392139 is a deficient number, since it is larger than the sum of its proper divisors (1).

161392139 is an equidigital number, since it uses as much as digits as its factorization.

161392139 is an evil number, because the sum of its binary digits is even.

The product of its digits is 8748, while the sum is 35.

The square root of 161392139 is about 12704.0205840513. The cubic root of 161392139 is about 544.4534981310.

The spelling of 161392139 in words is "one hundred sixty-one million, three hundred ninety-two thousand, one hundred thirty-nine".