161394697 has 2 divisors, whose sum is σ = 161394698. Its totient is φ = 161394696.

The previous prime is 161394661. The next prime is 161394731. The reversal of 161394697 is 796493161.

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., 160503561 + 891136 = 12669^2 + 944^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161394697 is a prime.

It is not a weakly prime, because it can be changed into another prime (161394637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80697348 + 80697349.

It is an arithmetic number, because the mean of its divisors is an integer number (80697349).

Almost surely, 2^161394697 is an apocalyptic number.

It is an amenable number.

161394697 is a deficient number, since it is larger than the sum of its proper divisors (1).

161394697 is an equidigital number, since it uses as much as digits as its factorization.

161394697 is an evil number, because the sum of its binary digits is even.

The product of its digits is 244944, while the sum is 46.

The square root of 161394697 is about 12704.1212604414. The cubic root of 161394697 is about 544.4563745716.

The spelling of 161394697 in words is "one hundred sixty-one million, three hundred ninety-four thousand, six hundred ninety-seven".