396881 has 2 divisors, whose sum is σ = 396882. Its totient is φ = 396880.

The previous prime is 396871. The next prime is 396883. The reversal of 396881 is 188693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 297025 + 99856 = 545^2 + 316^2 .

It is an emirp because it is prime and its reverse (188693) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-396881 is a prime.

It is a super-2 number, since 2×396881² = 315029056322, which contains 22 as substring.

Together with 396883, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (396883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198440 + 198441.

It is an arithmetic number, because the mean of its divisors is an integer number (198441).

2³⁹⁶⁸⁸¹ is an apocalyptic number.

It is an amenable number.

396881 is a deficient number, since it is larger than the sum of its proper divisors (1).

396881 is an equidigital number, since it uses as much as digits as its factorization.

396881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10368, while the sum is 35.

The square root of 396881 is about 629.9849204545. The cubic root of 396881 is about 73.4886218060.

The spelling of 396881 in words is "three hundred ninety-six thousand, eight hundred eighty-one".