161038517 has 2 divisors, whose sum is σ = 161038518. Its totient is φ = 161038516.

The previous prime is 161038489. The next prime is 161038519. The reversal of 161038517 is 715830161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 100681156 + 60357361 = 10034^2 + 7769^2 .

It is a cyclic number.

It is not a de Polignac number, because 161038517 - 2¹⁴ = 161022133 is a prime.

Together with 161038519, 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 (161038519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80519258 + 80519259.

It is an arithmetic number, because the mean of its divisors is an integer number (80519259).

Almost surely, 2^161038517 is an apocalyptic number.

It is an amenable number.

161038517 is a deficient number, since it is larger than the sum of its proper divisors (1).

161038517 is an equidigital number, since it uses as much as digits as its factorization.

161038517 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5040, while the sum is 32.

The square root of 161038517 is about 12690.0952321092. The cubic root of 161038517 is about 544.0555615197.

Adding to 161038517 its reverse (715830161), we get a palindrome (876868678).

The spelling of 161038517 in words is "one hundred sixty-one million, thirty-eight thousand, five hundred seventeen".