394343493 has 4 divisors (see below), whose sum is σ = 525791328. Its totient is φ = 262895660.

The previous prime is 394343483. The next prime is 394343501.

394343493 is nontrivially palindromic in base 10.

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 a de Polignac number, because none of the positive numbers 2^k-394343493 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394343483) 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, 65723913 + ... + 65723918.

It is an arithmetic number, because the mean of its divisors is an integer number (131447832).

Almost surely, 2^394343493 is an apocalyptic number.

It is an amenable number.

394343493 is a deficient number, since it is larger than the sum of its proper divisors (131447835).

394343493 is a wasteful number, since it uses less digits than its factorization.

394343493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131447834.

The product of its digits is 419904, while the sum is 42.

The square root of 394343493 is about 19858.0838199460. The cubic root of 394343493 is about 733.3166734278.

The spelling of 394343493 in words is "three hundred ninety-four million, three hundred forty-three thousand, four hundred ninety-three".