396860917 has 4 divisors (see below), whose sum is σ = 397314316. Its totient is φ = 396407520.

The previous prime is 396860909. The next prime is 396860941. The reversal of 396860917 is 719068693.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 269419396 + 127441521 = 16414^2 + 11289^2 .

It is a cyclic number.

It is not a de Polignac number, because 396860917 - 2³ = 396860909 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396860987) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225384 + ... + 227137.

It is an arithmetic number, because the mean of its divisors is an integer number (99328579).

Almost surely, 2^396860917 is an apocalyptic number.

It is an amenable number.

396860917 is a deficient number, since it is larger than the sum of its proper divisors (453399).

396860917 is an equidigital number, since it uses as much as digits as its factorization.

396860917 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 453398.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 396860917 is about 19921.3683515967. The cubic root of 396860917 is about 734.8738222633.

The spelling of 396860917 in words is "three hundred ninety-six million, eight hundred sixty thousand, nine hundred seventeen".