161015597 has 2 divisors, whose sum is σ = 161015598. Its totient is φ = 161015596.

The previous prime is 161015593. The next prime is 161015611. The reversal of 161015597 is 795510161.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90136036 + 70879561 = 9494^2 + 8419^2 .

It is an emirp because it is prime and its reverse (795510161) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 161015597 - 2² = 161015593 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (161015593) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80507798 + 80507799.

It is an arithmetic number, because the mean of its divisors is an integer number (80507799).

Almost surely, 2^161015597 is an apocalyptic number.

It is an amenable number.

161015597 is a deficient number, since it is larger than the sum of its proper divisors (1).

161015597 is an equidigital number, since it uses as much as digits as its factorization.

161015597 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9450, while the sum is 35.

The square root of 161015597 is about 12689.1921334654. The cubic root of 161015597 is about 544.0297491751.

The spelling of 161015597 in words is "one hundred sixty-one million, fifteen thousand, five hundred ninety-seven".