396298421 has 2 divisors, whose sum is σ = 396298422. Its totient is φ = 396298420.

The previous prime is 396298411. The next prime is 396298423. The reversal of 396298421 is 124892693.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 219780625 + 176517796 = 14825^2 + 13286^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-396298421 is a prime.

Together with 396298423, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396298423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198149210 + 198149211.

It is an arithmetic number, because the mean of its divisors is an integer number (198149211).

Almost surely, 2^396298421 is an apocalyptic number.

It is an amenable number.

396298421 is a deficient number, since it is larger than the sum of its proper divisors (1).

396298421 is an equidigital number, since it uses as much as digits as its factorization.

396298421 is an evil number, because the sum of its binary digits is even.

The product of its digits is 186624, while the sum is 44.

The square root of 396298421 is about 19907.2454397890. The cubic root of 396298421 is about 734.5264637664.

The spelling of 396298421 in words is "three hundred ninety-six million, two hundred ninety-eight thousand, four hundred twenty-one".