161038817 has 2 divisors, whose sum is σ = 161038818. Its totient is φ = 161038816.

The previous prime is 161038811. The next prime is 161038849. The reversal of 161038817 is 718830161.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 144384256 + 16654561 = 12016^2 + 4081^2 .

It is a cyclic number.

It is not a de Polignac number, because 161038817 - 2¹² = 161034721 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (161038811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80519408 + 80519409.

It is an arithmetic number, because the mean of its divisors is an integer number (80519409).

Almost surely, 2^161038817 is an apocalyptic number.

It is an amenable number.

161038817 is a deficient number, since it is larger than the sum of its proper divisors (1).

161038817 is an equidigital number, since it uses as much as digits as its factorization.

161038817 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 35.

The square root of 161038817 is about 12690.1070523459. The cubic root of 161038817 is about 544.0558993614.

Adding to 161038817 its reverse (718830161), we get a palindrome (879868978).

The spelling of 161038817 in words is "one hundred sixty-one million, thirty-eight thousand, eight hundred seventeen".