396862621 has 2 divisors, whose sum is σ = 396862622. Its totient is φ = 396862620.

The previous prime is 396862601. The next prime is 396862643. The reversal of 396862621 is 126268693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 320911396 + 75951225 = 17914^2 + 8715^2 .

It is an emirp because it is prime and its reverse (126268693) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 396862621 - 2¹¹ = 396860573 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396862601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198431310 + 198431311.

It is an arithmetic number, because the mean of its divisors is an integer number (198431311).

Almost surely, 2^396862621 is an apocalyptic number.

It is an amenable number.

396862621 is a deficient number, since it is larger than the sum of its proper divisors (1).

396862621 is an equidigital number, since it uses as much as digits as its factorization.

396862621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 43.

The square root of 396862621 is about 19921.4111196973. The cubic root of 396862621 is about 734.8748740367.

The spelling of 396862621 in words is "three hundred ninety-six million, eight hundred sixty-two thousand, six hundred twenty-one".