396971239 has 16 divisors (see below), whose sum is σ = 463579200. Its totient is φ = 332918784.

The previous prime is 396971231. The next prime is 396971243. The reversal of 396971239 is 932179693.

It is a cyclic number.

It is not a de Polignac number, because 396971239 - 2³ = 396971231 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 396971192 and 396971201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396971231) 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 15 ways as a sum of consecutive naturals, for example, 57147 + ... + 63715.

It is an arithmetic number, because the mean of its divisors is an integer number (28973700).

Almost surely, 2^396971239 is an apocalyptic number.

396971239 is a deficient number, since it is larger than the sum of its proper divisors (66607961).

396971239 is an equidigital number, since it uses as much as digits as its factorization.

396971239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6762.

The product of its digits is 551124, while the sum is 49.

The square root of 396971239 is about 19924.1370954930. The cubic root of 396971239 is about 734.9419109691.

The spelling of 396971239 in words is "three hundred ninety-six million, nine hundred seventy-one thousand, two hundred thirty-nine".