161828923 has 2 divisors, whose sum is σ = 161828924. Its totient is φ = 161828922.

The previous prime is 161828911. The next prime is 161828929. The reversal of 161828923 is 329828161.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 161828923 - 2¹³ = 161820731 is a prime.

It is not a weakly prime, because it can be changed into another prime (161828929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80914461 + 80914462.

It is an arithmetic number, because the mean of its divisors is an integer number (80914462).

Almost surely, 2^161828923 is an apocalyptic number.

161828923 is a deficient number, since it is larger than the sum of its proper divisors (1).

161828923 is an equidigital number, since it uses as much as digits as its factorization.

161828923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 40.

The square root of 161828923 is about 12721.1997468792. The cubic root of 161828923 is about 544.9442167185.

The spelling of 161828923 in words is "one hundred sixty-one million, eight hundred twenty-eight thousand, nine hundred twenty-three".