399682307 has 2 divisors, whose sum is σ = 399682308. Its totient is φ = 399682306.

The previous prime is 399682277. The next prime is 399682369. The reversal of 399682307 is 703286993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 399682307 - 2¹⁴ = 399665923 is a prime.

It is not a weakly prime, because it can be changed into another prime (399682007) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199841153 + 199841154.

It is an arithmetic number, because the mean of its divisors is an integer number (199841154).

Almost surely, 2^399682307 is an apocalyptic number.

399682307 is a deficient number, since it is larger than the sum of its proper divisors (1).

399682307 is an equidigital number, since it uses as much as digits as its factorization.

399682307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 47.

The square root of 399682307 is about 19992.0560973603. The cubic root of 399682307 is about 736.6111828931.

The spelling of 399682307 in words is "three hundred ninety-nine million, six hundred eighty-two thousand, three hundred seven".