161959683 has 4 divisors (see below), whose sum is σ = 215946248. Its totient is φ = 107973120.

The previous prime is 161959673. The next prime is 161959687. The reversal of 161959683 is 386959161.

161959683 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 386959161 = 3 ⋅128986387.

It is not a de Polignac number, because 161959683 - 2¹⁰ = 161958659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161959687) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26993278 + ... + 26993283.

It is an arithmetic number, because the mean of its divisors is an integer number (53986562).

Almost surely, 2^161959683 is an apocalyptic number.

161959683 is a deficient number, since it is larger than the sum of its proper divisors (53986565).

161959683 is an equidigital number, since it uses as much as digits as its factorization.

161959683 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53986564.

The product of its digits is 349920, while the sum is 48.

The square root of 161959683 is about 12726.3381614666. The cubic root of 161959683 is about 545.0909513501.

It can be divided in two parts, 16195 and 9683, that added together give a triangular number (25878 = T₂₂₇).

The spelling of 161959683 in words is "one hundred sixty-one million, nine hundred fifty-nine thousand, six hundred eighty-three".