396827957 has 4 divisors (see below), whose sum is σ = 420170796. Its totient is φ = 373485120.

The previous prime is 396827953. The next prime is 396827969. The reversal of 396827957 is 759728693.

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 296046436 + 100781521 = 17206^2 + 10039^2 .

It is a cyclic number.

It is not a de Polignac number, because 396827957 - 2² = 396827953 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 (396827953) 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 in 3 ways as a sum of consecutive naturals, for example, 11671394 + ... + 11671427.

It is an arithmetic number, because the mean of its divisors is an integer number (105042699).

Almost surely, 2^396827957 is an apocalyptic number.

It is an amenable number.

396827957 is a deficient number, since it is larger than the sum of its proper divisors (23342839).

396827957 is a wasteful number, since it uses less digits than its factorization.

396827957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23342838.

The product of its digits is 5715360, while the sum is 56.

The square root of 396827957 is about 19920.5410820088. The cubic root of 396827957 is about 734.8534775105.

The spelling of 396827957 in words is "three hundred ninety-six million, eight hundred twenty-seven thousand, nine hundred fifty-seven".