393434489 has 4 divisors (see below), whose sum is σ = 449639424. Its totient is φ = 337229556.

The previous prime is 393434441. The next prime is 393434497. The reversal of 393434489 is 984434393.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 393434489 - 2⁸ = 393434233 is a prime.

It is a super-2 number, since 2×393434489² = 309581394269382242, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (393430489) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28102457 + ... + 28102470.

It is an arithmetic number, because the mean of its divisors is an integer number (112409856).

Almost surely, 2^393434489 is an apocalyptic number.

It is an amenable number.

393434489 is a deficient number, since it is larger than the sum of its proper divisors (56204935).

393434489 is an equidigital number, since it uses as much as digits as its factorization.

393434489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56204934.

The product of its digits is 1119744, while the sum is 47.

The square root of 393434489 is about 19835.1831098178. The cubic root of 393434489 is about 732.7527820965.

The spelling of 393434489 in words is "three hundred ninety-three million, four hundred thirty-four thousand, four hundred eighty-nine".