161941723 has 2 divisors, whose sum is σ = 161941724. Its totient is φ = 161941722.

The previous prime is 161941709. The next prime is 161941729. The reversal of 161941723 is 327149161.

161941723 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 161941723 - 2⁵ = 161941691 is a prime.

It is not a weakly prime, because it can be changed into another prime (161941729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80970861 + 80970862.

It is an arithmetic number, because the mean of its divisors is an integer number (80970862).

Almost surely, 2^161941723 is an apocalyptic number.

161941723 is a deficient number, since it is larger than the sum of its proper divisors (1).

161941723 is an equidigital number, since it uses as much as digits as its factorization.

161941723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 34.

The square root of 161941723 is about 12725.6325186609. The cubic root of 161941723 is about 545.0708019006.

The spelling of 161941723 in words is "one hundred sixty-one million, nine hundred forty-one thousand, seven hundred twenty-three".