393871039 has 2 divisors, whose sum is σ = 393871040. Its totient is φ = 393871038.

The previous prime is 393871033. The next prime is 393871043. The reversal of 393871039 is 930178393.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 393871039 - 2⁹ = 393870527 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 393870986 and 393871004.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (393871033) 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, 196935519 + 196935520.

It is an arithmetic number, because the mean of its divisors is an integer number (196935520).

Almost surely, 2^393871039 is an apocalyptic number.

393871039 is a deficient number, since it is larger than the sum of its proper divisors (1).

393871039 is an equidigital number, since it uses as much as digits as its factorization.

393871039 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 122472, while the sum is 43.

The square root of 393871039 is about 19846.1844947587. The cubic root of 393871039 is about 733.0236997003.

The spelling of 393871039 in words is "three hundred ninety-three million, eight hundred seventy-one thousand, thirty-nine".