396545923 has 4 divisors (see below), whose sum is σ = 396586368. Its totient is φ = 396505480.

The previous prime is 396545917. The next prime is 396545939. The reversal of 396545923 is 329545693.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 329545693 = 349 ⋅944257.

It is a cyclic number.

It is not a de Polignac number, because 396545923 - 2²¹ = 394448771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396545953) 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, 4833 + ... + 28573.

It is an arithmetic number, because the mean of its divisors is an integer number (99146592).

Almost surely, 2^396545923 is an apocalyptic number.

396545923 is a deficient number, since it is larger than the sum of its proper divisors (40445).

396545923 is a wasteful number, since it uses less digits than its factorization.

396545923 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40444.

The product of its digits is 874800, while the sum is 46.

The square root of 396545923 is about 19913.4608493853. The cubic root of 396545923 is about 734.6793442946.

The spelling of 396545923 in words is "three hundred ninety-six million, five hundred forty-five thousand, nine hundred twenty-three".