161642983 has 2 divisors, whose sum is σ = 161642984. Its totient is φ = 161642982.

The previous prime is 161642963. The next prime is 161643017. The reversal of 161642983 is 389246161.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 161642983 - 2⁹ = 161642471 is a prime.

It is a super-2 number, since 2×161642983² = 52256907906276578, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161642963) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80821491 + 80821492.

It is an arithmetic number, because the mean of its divisors is an integer number (80821492).

Almost surely, 2^161642983 is an apocalyptic number.

161642983 is a deficient number, since it is larger than the sum of its proper divisors (1).

161642983 is an equidigital number, since it uses as much as digits as its factorization.

161642983 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 40.

The square root of 161642983 is about 12713.8893734372. The cubic root of 161642983 is about 544.7354247043.

The spelling of 161642983 in words is "one hundred sixty-one million, six hundred forty-two thousand, nine hundred eighty-three".