161736959 has 2 divisors, whose sum is σ = 161736960. Its totient is φ = 161736958.

The previous prime is 161736947. The next prime is 161736961. The reversal of 161736959 is 959637161.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161736959 is a prime.

Together with 161736961, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161736979) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80868479 + 80868480.

It is an arithmetic number, because the mean of its divisors is an integer number (80868480).

Almost surely, 2^161736959 is an apocalyptic number.

161736959 is a deficient number, since it is larger than the sum of its proper divisors (1).

161736959 is an equidigital number, since it uses as much as digits as its factorization.

161736959 is an evil number, because the sum of its binary digits is even.

The product of its digits is 306180, while the sum is 47.

The square root of 161736959 is about 12717.5846370292. The cubic root of 161736959 is about 544.8409703495.

It can be divided in two parts, 16173 and 6959, that added together give a palindrome (23132).

The spelling of 161736959 in words is "one hundred sixty-one million, seven hundred thirty-six thousand, nine hundred fifty-nine".