161833723 has 2 divisors, whose sum is σ = 161833724. Its totient is φ = 161833722.

The previous prime is 161833709. The next prime is 161833747. The reversal of 161833723 is 327338161.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161833723 is a prime.

It is not a weakly prime, because it can be changed into another prime (161833753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80916861 + 80916862.

It is an arithmetic number, because the mean of its divisors is an integer number (80916862).

Almost surely, 2^161833723 is an apocalyptic number.

161833723 is a deficient number, since it is larger than the sum of its proper divisors (1).

161833723 is an equidigital number, since it uses as much as digits as its factorization.

161833723 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 34.

The square root of 161833723 is about 12721.3884069311. The cubic root of 161833723 is about 544.9496045201.

The spelling of 161833723 in words is "one hundred sixty-one million, eight hundred thirty-three thousand, seven hundred twenty-three".