394342993 has 24 divisors (see below), whose sum is σ = 442487808. Its totient is φ = 351120000.

The previous prime is 394342987. The next prime is 394343021. The reversal of 394342993 is 399243493.

It is not a de Polignac number, because 394342993 - 2¹⁷ = 394211921 is a prime.

It is a super-2 number, since 2×394342993² = 311012792256396098, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394342903) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2064528 + ... + 2064718.

It is an arithmetic number, because the mean of its divisors is an integer number (18436992).

Almost surely, 2^394342993 is an apocalyptic number.

It is an amenable number.

394342993 is a deficient number, since it is larger than the sum of its proper divisors (48144815).

394342993 is a wasteful number, since it uses less digits than its factorization.

394342993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 477 (or 466 counting only the distinct ones).

The product of its digits is 629856, while the sum is 46.

The square root of 394342993 is about 19858.0712306105. The cubic root of 394342993 is about 733.3163634962.

The spelling of 394342993 in words is "three hundred ninety-four million, three hundred forty-two thousand, nine hundred ninety-three".