396717823 has 4 divisors (see below), whose sum is σ = 413966448. Its totient is φ = 379469200.

The previous prime is 396717821. The next prime is 396717851. The reversal of 396717823 is 328717693.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 396717823 - 2¹ = 396717821 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 (396717821) 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, 8624278 + ... + 8624323.

It is an arithmetic number, because the mean of its divisors is an integer number (103491612).

Almost surely, 2^396717823 is an apocalyptic number.

396717823 is a deficient number, since it is larger than the sum of its proper divisors (17248625).

396717823 is a wasteful number, since it uses less digits than its factorization.

396717823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17248624.

The product of its digits is 381024, while the sum is 46.

The square root of 396717823 is about 19917.7765576382. The cubic root of 396717823 is about 734.7854884825.

The spelling of 396717823 in words is "three hundred ninety-six million, seven hundred seventeen thousand, eight hundred twenty-three".