393849487 has 2 divisors, whose sum is σ = 393849488. Its totient is φ = 393849486.

The previous prime is 393849481. The next prime is 393849563. The reversal of 393849487 is 784948393.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 393849487 - 2¹⁹ = 393325199 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (393849481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 196924743 + 196924744.

It is an arithmetic number, because the mean of its divisors is an integer number (196924744).

Almost surely, 2^393849487 is an apocalyptic number.

393849487 is a deficient number, since it is larger than the sum of its proper divisors (1).

393849487 is an equidigital number, since it uses as much as digits as its factorization.

393849487 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5225472, while the sum is 55.

The square root of 393849487 is about 19845.6415114251. The cubic root of 393849487 is about 733.0103294908.

The spelling of 393849487 in words is "three hundred ninety-three million, eight hundred forty-nine thousand, four hundred eighty-seven".