396867161 has 2 divisors, whose sum is σ = 396867162. Its totient is φ = 396867160.

The previous prime is 396867071. The next prime is 396867221. The reversal of 396867161 is 161768693.

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., 241989136 + 154878025 = 15556^2 + 12445^2 .

It is an emirp because it is prime and its reverse (161768693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 396867161 - 2¹⁰ = 396866137 is a prime.

It is not a weakly prime, because it can be changed into another prime (396860161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198433580 + 198433581.

It is an arithmetic number, because the mean of its divisors is an integer number (198433581).

Almost surely, 2^396867161 is an apocalyptic number.

It is an amenable number.

396867161 is a deficient number, since it is larger than the sum of its proper divisors (1).

396867161 is an equidigital number, since it uses as much as digits as its factorization.

396867161 is an evil number, because the sum of its binary digits is even.

The product of its digits is 326592, while the sum is 47.

The square root of 396867161 is about 19921.5250671227. The cubic root of 396867161 is about 734.8776762819.

The spelling of 396867161 in words is "three hundred ninety-six million, eight hundred sixty-seven thousand, one hundred sixty-one".