399000011 has 2 divisors, whose sum is σ = 399000012. Its totient is φ = 399000010.

The previous prime is 398999999. The next prime is 399000029. The reversal of 399000011 is 110000993.

It is a weak prime.

It is an emirp because it is prime and its reverse (110000993) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 399000011 - 2⁶ = 398999947 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (399008011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199500005 + 199500006.

It is an arithmetic number, because the mean of its divisors is an integer number (199500006).

Almost surely, 2^399000011 is an apocalyptic number.

399000011 is a deficient number, since it is larger than the sum of its proper divisors (1).

399000011 is an equidigital number, since it uses as much as digits as its factorization.

399000011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 243, while the sum is 23.

The square root of 399000011 is about 19974.9846307826. The cubic root of 399000011 is about 736.1917888608.

The spelling of 399000011 in words is "three hundred ninety-nine million, eleven", and thus it is an aban number.