393949493 has 8 divisors (see below), whose sum is σ = 452925312. Its totient is φ = 335648016.

The previous prime is 393949489. The next prime is 393949513. The reversal of 393949493 is 394949393.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 393949493 - 2² = 393949489 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393949403) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 167330 + ... + 169667.

It is an arithmetic number, because the mean of its divisors is an integer number (56615664).

Almost surely, 2^393949493 is an apocalyptic number.

It is an amenable number.

393949493 is a deficient number, since it is larger than the sum of its proper divisors (58975819).

393949493 is a wasteful number, since it uses less digits than its factorization.

393949493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337171.

The product of its digits is 2834352, while the sum is 53.

The square root of 393949493 is about 19848.1609475538. The cubic root of 393949493 is about 733.0723660723.

The spelling of 393949493 in words is "three hundred ninety-three million, nine hundred forty-nine thousand, four hundred ninety-three".