396861643 has 2 divisors, whose sum is σ = 396861644. Its totient is φ = 396861642.

The previous prime is 396861637. The next prime is 396861691. The reversal of 396861643 is 346168693.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 396861643 - 2⁵ = 396861611 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 396861593 and 396861602.

It is not a weakly prime, because it can be changed into another prime (396861613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198430821 + 198430822.

It is an arithmetic number, because the mean of its divisors is an integer number (198430822).

Almost surely, 2^396861643 is an apocalyptic number.

396861643 is a deficient number, since it is larger than the sum of its proper divisors (1).

396861643 is an equidigital number, since it uses as much as digits as its factorization.

396861643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 46.

The square root of 396861643 is about 19921.3865732283. The cubic root of 396861643 is about 734.8742703784.

The spelling of 396861643 in words is "three hundred ninety-six million, eight hundred sixty-one thousand, six hundred forty-three".