399782011 has 2 divisors, whose sum is σ = 399782012. Its totient is φ = 399782010.

The previous prime is 399781997. The next prime is 399782027. The reversal of 399782011 is 110287993.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 399782011 - 2¹⁷ = 399650939 is a prime.

It is not a weakly prime, because it can be changed into another prime (399782111) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199891005 + 199891006.

It is an arithmetic number, because the mean of its divisors is an integer number (199891006).

Almost surely, 2^399782011 is an apocalyptic number.

399782011 is a deficient number, since it is larger than the sum of its proper divisors (1).

399782011 is an equidigital number, since it uses as much as digits as its factorization.

399782011 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 40.

The square root of 399782011 is about 19994.5495323100. The cubic root of 399782011 is about 736.6724290161.

The spelling of 399782011 in words is "three hundred ninety-nine million, seven hundred eighty-two thousand, eleven".