161914897 has 2 divisors, whose sum is σ = 161914898. Its totient is φ = 161914896.

The previous prime is 161914847. The next prime is 161914901. The reversal of 161914897 is 798419161.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 156350016 + 5564881 = 12504^2 + 2359^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161914897 is a prime.

It is not a weakly prime, because it can be changed into another prime (161914847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80957448 + 80957449.

It is an arithmetic number, because the mean of its divisors is an integer number (80957449).

Almost surely, 2^161914897 is an apocalyptic number.

It is an amenable number.

161914897 is a deficient number, since it is larger than the sum of its proper divisors (1).

161914897 is an equidigital number, since it uses as much as digits as its factorization.

161914897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 46.

The square root of 161914897 is about 12724.5784606014. The cubic root of 161914897 is about 545.0407028490.

The spelling of 161914897 in words is "one hundred sixty-one million, nine hundred fourteen thousand, eight hundred ninety-seven".