399000020010247 has 2 divisors, whose sum is σ = 399000020010248. Its totient is φ = 399000020010246.

The previous prime is 399000020010197. The next prime is 399000020010281. The reversal of 399000020010247 is 742010020000993.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 399000020010247 - 2³⁹ = 398450264196359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399000020014247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199500010005123 + 199500010005124.

It is an arithmetic number, because the mean of its divisors is an integer number (199500010005124).

Almost surely, 2^{399000020010247} is an apocalyptic number.

399000020010247 is a deficient number, since it is larger than the sum of its proper divisors (1).

399000020010247 is an equidigital number, since it uses as much as digits as its factorization.

399000020010247 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27216, while the sum is 37.

The spelling of 399000020010247 in words is "three hundred ninety-nine trillion, twenty million, ten thousand, two hundred forty-seven".