396861613 has 2 divisors, whose sum is σ = 396861614. Its totient is φ = 396861612.

The previous prime is 396861611. The next prime is 396861637. The reversal of 396861613 is 316168693.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 396686889 + 174724 = 19917^2 + 418^2 .

It is a cyclic number.

It is not a de Polignac number, because 396861613 - 2¹ = 396861611 is a prime.

Together with 396861611, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 396861613.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (396861611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198430806 + 198430807.

It is an arithmetic number, because the mean of its divisors is an integer number (198430807).

Almost surely, 2^396861613 is an apocalyptic number.

It is an amenable number.

396861613 is a deficient number, since it is larger than the sum of its proper divisors (1).

396861613 is an equidigital number, since it uses as much as digits as its factorization.

396861613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 139968, while the sum is 43.

The square root of 396861613 is about 19921.3858202686. The cubic root of 396861613 is about 734.8742518612.

The spelling of 396861613 in words is "three hundred ninety-six million, eight hundred sixty-one thousand, six hundred thirteen".