399230847 has 12 divisors (see below), whose sum is σ = 580206744. Its totient is φ = 264520080.

The previous prime is 399230837. The next prime is 399230857. The reversal of 399230847 is 748032993.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (399230837) and next prime (399230857).

It is not a de Polignac number, because 399230847 - 2⁸ = 399230591 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (399230807) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 134604 + ... + 137537.

It is an arithmetic number, because the mean of its divisors is an integer number (48350562).

Almost surely, 2^399230847 is an apocalyptic number.

399230847 is a deficient number, since it is larger than the sum of its proper divisors (180975897).

399230847 is a wasteful number, since it uses less digits than its factorization.

399230847 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 272310 (or 272307 counting only the distinct ones).

The product of its (nonzero) digits is 326592, while the sum is 45.

The square root of 399230847 is about 19980.7619224093. The cubic root of 399230847 is about 736.3337327217. Note that the first 3 decimals are identical.

The spelling of 399230847 in words is "three hundred ninety-nine million, two hundred thirty thousand, eight hundred forty-seven".