3897161 has 2 divisors, whose sum is σ = 3897162. Its totient is φ = 3897160.

The previous prime is 3897151. The next prime is 3897181. The reversal of 3897161 is 1617983.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3041536 + 855625 = 1744^2 + 925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-3897161 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (3897121) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1948580 + 1948581.

It is an arithmetic number, because the mean of its divisors is an integer number (1948581).

Almost surely, 2^3897161 is an apocalyptic number.

It is an amenable number.

3897161 is a deficient number, since it is larger than the sum of its proper divisors (1).

3897161 is an equidigital number, since it uses as much as digits as its factorization.

3897161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9072, while the sum is 35.

The square root of 3897161 is about 1974.1228431888. The cubic root of 3897161 is about 157.3678878706.

The spelling of 3897161 in words is "three million, eight hundred ninety-seven thousand, one hundred sixty-one".