396429427 has 4 divisors (see below), whose sum is σ = 405648760. Its totient is φ = 387210096.

The previous prime is 396429401. The next prime is 396429431. The reversal of 396429427 is 724924693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 724924693 = 17 ⋅42642629.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-396429427 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (396429487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4609602 + ... + 4609687.

It is an arithmetic number, because the mean of its divisors is an integer number (101412190).

Almost surely, 2^396429427 is an apocalyptic number.

396429427 is a deficient number, since it is larger than the sum of its proper divisors (9219333).

396429427 is an equidigital number, since it uses as much as digits as its factorization.

396429427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9219332.

The product of its digits is 653184, while the sum is 46.

The square root of 396429427 is about 19910.5355779296. The cubic root of 396429427 is about 734.6073933280.

The spelling of 396429427 in words is "three hundred ninety-six million, four hundred twenty-nine thousand, four hundred twenty-seven".