393649343 has 4 divisors (see below), whose sum is σ = 394099080. Its totient is φ = 393199608.

The previous prime is 393649307. The next prime is 393649349. The reversal of 393649343 is 343946393.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 393649343 - 2⁶ = 393649279 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 393649294 and 393649303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (393649349) 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, 223553 + ... + 225306.

It is an arithmetic number, because the mean of its divisors is an integer number (98524770).

Almost surely, 2^393649343 is an apocalyptic number.

393649343 is a deficient number, since it is larger than the sum of its proper divisors (449737).

393649343 is an equidigital number, since it uses as much as digits as its factorization.

393649343 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449736.

The product of its digits is 629856, while the sum is 44.

The square root of 393649343 is about 19840.5983528723. The cubic root of 393649343 is about 732.8861428982.

The spelling of 393649343 in words is "three hundred ninety-three million, six hundred forty-nine thousand, three hundred forty-three".