161789983 has 2 divisors, whose sum is σ = 161789984. Its totient is φ = 161789982.

The previous prime is 161789923. The next prime is 161789989. The reversal of 161789983 is 389987161.

It is a happy number.

161789983 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 161789983 - 2²¹ = 159692831 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 161789983.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161789989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80894991 + 80894992.

It is an arithmetic number, because the mean of its divisors is an integer number (80894992).

Almost surely, 2^161789983 is an apocalyptic number.

161789983 is a deficient number, since it is larger than the sum of its proper divisors (1).

161789983 is an equidigital number, since it uses as much as digits as its factorization.

161789983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 653184, while the sum is 52.

The square root of 161789983 is about 12719.6691387787. The cubic root of 161789983 is about 544.9005042398.

The spelling of 161789983 in words is "one hundred sixty-one million, seven hundred eighty-nine thousand, nine hundred eighty-three".