396747823 has 4 divisors (see below), whose sum is σ = 397019008. Its totient is φ = 396476640.

The previous prime is 396747817. The next prime is 396747829. The reversal of 396747823 is 328747693.

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

It is an interprime number because it is at equal distance from previous prime (396747817) and next prime (396747829).

It is a cyclic number.

It is not a de Polignac number, because 396747823 - 2²¹ = 394650671 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 (396747829) 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, 133386 + ... + 136327.

It is an arithmetic number, because the mean of its divisors is an integer number (99254752).

Almost surely, 2^396747823 is an apocalyptic number.

396747823 is a deficient number, since it is larger than the sum of its proper divisors (271185).

396747823 is a wasteful number, since it uses less digits than its factorization.

396747823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 271184.

The product of its digits is 1524096, while the sum is 49.

The square root of 396747823 is about 19918.5296395090. The cubic root of 396747823 is about 734.8040096309.

The spelling of 396747823 in words is "three hundred ninety-six million, seven hundred forty-seven thousand, eight hundred twenty-three".