161736313 has 2 divisors, whose sum is σ = 161736314. Its totient is φ = 161736312.

The previous prime is 161736301. The next prime is 161736329. The reversal of 161736313 is 313637161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 161493264 + 243049 = 12708^2 + 493^2 .

It is a cyclic number.

It is not a de Polignac number, because 161736313 - 2⁹ = 161735801 is a prime.

It is not a weakly prime, because it can be changed into another prime (161736383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80868156 + 80868157.

It is an arithmetic number, because the mean of its divisors is an integer number (80868157).

Almost surely, 2^161736313 is an apocalyptic number.

It is an amenable number.

161736313 is a deficient number, since it is larger than the sum of its proper divisors (1).

161736313 is an equidigital number, since it uses as much as digits as its factorization.

161736313 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6804, while the sum is 31.

The square root of 161736313 is about 12717.5592390993. The cubic root of 161736313 is about 544.8402449582.

The spelling of 161736313 in words is "one hundred sixty-one million, seven hundred thirty-six thousand, three hundred thirteen".