161838983 has 2 divisors, whose sum is σ = 161838984. Its totient is φ = 161838982.

The previous prime is 161838973. The next prime is 161839009. The reversal of 161838983 is 389838161.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161838983 - 2⁸ = 161838727 is a prime.

It is a Sophie Germain prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161838913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80919491 + 80919492.

It is an arithmetic number, because the mean of its divisors is an integer number (80919492).

Almost surely, 2^161838983 is an apocalyptic number.

161838983 is a deficient number, since it is larger than the sum of its proper divisors (1).

161838983 is an equidigital number, since it uses as much as digits as its factorization.

161838983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 248832, while the sum is 47.

The square root of 161838983 is about 12721.5951436917. The cubic root of 161838983 is about 544.9555085303.

The spelling of 161838983 in words is "one hundred sixty-one million, eight hundred thirty-eight thousand, nine hundred eighty-three".