161497613 has 2 divisors, whose sum is σ = 161497614. Its totient is φ = 161497612.

The previous prime is 161497601. The next prime is 161497619. The reversal of 161497613 is 316794161.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 122722084 + 38775529 = 11078^2 + 6227^2 .

It is an emirp because it is prime and its reverse (316794161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161497613 - 2⁴ = 161497597 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161497619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80748806 + 80748807.

It is an arithmetic number, because the mean of its divisors is an integer number (80748807).

Almost surely, 2^161497613 is an apocalyptic number.

It is an amenable number.

161497613 is a deficient number, since it is larger than the sum of its proper divisors (1).

161497613 is an equidigital number, since it uses as much as digits as its factorization.

161497613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 27216, while the sum is 38.

The square root of 161497613 is about 12708.1711115329. The cubic root of 161497613 is about 544.5720771883.

The spelling of 161497613 in words is "one hundred sixty-one million, four hundred ninety-seven thousand, six hundred thirteen".