394354057 has 4 divisors (see below), whose sum is σ = 394394896. Its totient is φ = 394313220.

The previous prime is 394354039. The next prime is 394354061. The reversal of 394354057 is 750453493.

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, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 750453493 = 281 ⋅2670653.

It is a cyclic number.

It is not a de Polignac number, because 394354057 - 2¹⁵ = 394321289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394394057) 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, 3082 + ... + 28252.

It is an arithmetic number, because the mean of its divisors is an integer number (98598724).

Almost surely, 2^394354057 is an apocalyptic number.

It is an amenable number.

394354057 is a deficient number, since it is larger than the sum of its proper divisors (40839).

394354057 is a wasteful number, since it uses less digits than its factorization.

394354057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40838.

The product of its (nonzero) digits is 226800, while the sum is 40.

The square root of 394354057 is about 19858.3498055604. The cubic root of 394354057 is about 733.3232216007.

The spelling of 394354057 in words is "three hundred ninety-four million, three hundred fifty-four thousand, fifty-seven".