161025923 has 2 divisors, whose sum is σ = 161025924. Its totient is φ = 161025922.

The previous prime is 161025889. The next prime is 161025973. The reversal of 161025923 is 329520161.

It is a weak prime.

It is an emirp because it is prime and its reverse (329520161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161025923 - 2⁶ = 161025859 is a prime.

It is not a weakly prime, because it can be changed into another prime (161025973) 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, 80512961 + 80512962.

It is an arithmetic number, because the mean of its divisors is an integer number (80512962).

Almost surely, 2^161025923 is an apocalyptic number.

161025923 is a deficient number, since it is larger than the sum of its proper divisors (1).

161025923 is an equidigital number, since it uses as much as digits as its factorization.

161025923 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 161025923 is about 12689.5990086370. The cubic root of 161025923 is about 544.0413785477.

The spelling of 161025923 in words is "one hundred sixty-one million, twenty-five thousand, nine hundred twenty-three".