396473839 has 4 divisors (see below), whose sum is σ = 413711856. Its totient is φ = 379235824.

The previous prime is 396473837. The next prime is 396473851. The reversal of 396473839 is 938374693.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 938374693 = 47 ⋅19965419.

It is a cyclic number.

It is not a de Polignac number, because 396473839 - 2¹ = 396473837 is a prime.

It is a super-2 number, since 2×396473839² = 314383010022795842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396473837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8618974 + ... + 8619019.

It is an arithmetic number, because the mean of its divisors is an integer number (103427964).

Almost surely, 2^396473839 is an apocalyptic number.

396473839 is a deficient number, since it is larger than the sum of its proper divisors (17238017).

396473839 is a wasteful number, since it uses less digits than its factorization.

396473839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17238016.

The product of its digits is 2939328, while the sum is 52.

The square root of 396473839 is about 19911.6508356289. The cubic root of 396473839 is about 734.6348249993.

The spelling of 396473839 in words is "three hundred ninety-six million, four hundred seventy-three thousand, eight hundred thirty-nine".