161723753 has 2 divisors, whose sum is σ = 161723754. Its totient is φ = 161723752.

The previous prime is 161723743. The next prime is 161723767. The reversal of 161723753 is 357327161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 102171664 + 59552089 = 10108^2 + 7717^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161723753 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161723743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80861876 + 80861877.

It is an arithmetic number, because the mean of its divisors is an integer number (80861877).

Almost surely, 2^161723753 is an apocalyptic number.

It is an amenable number.

161723753 is a deficient number, since it is larger than the sum of its proper divisors (1).

161723753 is an equidigital number, since it uses as much as digits as its factorization.

161723753 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 26460, while the sum is 35.

The square root of 161723753 is about 12717.0654240670. The cubic root of 161723753 is about 544.8261409917.

The spelling of 161723753 in words is "one hundred sixty-one million, seven hundred twenty-three thousand, seven hundred fifty-three".