399199665307 has 2 divisors, whose sum is σ = 399199665308. Its totient is φ = 399199665306.

The previous prime is 399199665283. The next prime is 399199665311. The reversal of 399199665307 is 703566991993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399199665307 - 2¹¹ = 399199663259 is a prime.

It is not a weakly prime, because it can be changed into another prime (399199165307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199599832653 + 199599832654.

It is an arithmetic number, because the mean of its divisors is an integer number (199599832654).

Almost surely, 2^399199665307 is an apocalyptic number.

399199665307 is a deficient number, since it is larger than the sum of its proper divisors (1).

399199665307 is an equidigital number, since it uses as much as digits as its factorization.

399199665307 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 74401740, while the sum is 67.

The spelling of 399199665307 in words is "three hundred ninety-nine billion, one hundred ninety-nine million, six hundred sixty-five thousand, three hundred seven".