396197281 has 2 divisors, whose sum is σ = 396197282. Its totient is φ = 396197280.

The previous prime is 396197279. The next prime is 396197299. The reversal of 396197281 is 182791693.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 237437281 + 158760000 = 15409^2 + 12600^2 .

It is a cyclic number.

It is not a de Polignac number, because 396197281 - 2¹ = 396197279 is a prime.

It is a super-2 number, since 2×396197281² = 313944570943585922, which contains 22 as substring.

Together with 396197279, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (396197381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198098640 + 198098641.

It is an arithmetic number, because the mean of its divisors is an integer number (198098641).

Almost surely, 2^396197281 is an apocalyptic number.

It is an amenable number.

396197281 is a deficient number, since it is larger than the sum of its proper divisors (1).

396197281 is an equidigital number, since it uses as much as digits as its factorization.

396197281 is an evil number, because the sum of its binary digits is even.

The product of its digits is 163296, while the sum is 46.

The square root of 396197281 is about 19904.7049965580. The cubic root of 396197281 is about 734.4639718635.

The spelling of 396197281 in words is "three hundred ninety-six million, one hundred ninety-seven thousand, two hundred eighty-one".