399873011 has 2 divisors, whose sum is σ = 399873012. Its totient is φ = 399873010.

The previous prime is 399873007. The next prime is 399873029. The reversal of 399873011 is 110378993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 399873011 - 2² = 399873007 is a prime.

It is a super-2 number, since 2×399873011² = 319796849852412242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 399873011.

It is not a weakly prime, because it can be changed into another prime (399873311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199936505 + 199936506.

It is an arithmetic number, because the mean of its divisors is an integer number (199936506).

Almost surely, 2^399873011 is an apocalyptic number.

399873011 is a deficient number, since it is larger than the sum of its proper divisors (1).

399873011 is an equidigital number, since it uses as much as digits as its factorization.

399873011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40824, while the sum is 41.

The square root of 399873011 is about 19996.8250229880. The cubic root of 399873011 is about 736.7283195626.

The spelling of 399873011 in words is "three hundred ninety-nine million, eight hundred seventy-three thousand, eleven".