394618493 has 4 divisors (see below), whose sum is σ = 394723008. Its totient is φ = 394513980.

The previous prime is 394618489. The next prime is 394618507. The reversal of 394618493 is 394816493.

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 an emirpimes, since its reverse is a distinct semiprime: 394816493 = 1999 ⋅197507.

It is a cyclic number.

It is not a de Polignac number, because 394618493 - 2² = 394618489 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394618993) 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 3 ways as a sum of consecutive naturals, for example, 46373 + ... + 54218.

It is an arithmetic number, because the mean of its divisors is an integer number (98680752).

Almost surely, 2^394618493 is an apocalyptic number.

It is an amenable number.

394618493 is a deficient number, since it is larger than the sum of its proper divisors (104515).

394618493 is a wasteful number, since it uses less digits than its factorization.

394618493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 104514.

The product of its digits is 559872, while the sum is 47.

The square root of 394618493 is about 19865.0067455312. The cubic root of 394618493 is about 733.4870961090.

The spelling of 394618493 in words is "three hundred ninety-four million, six hundred eighteen thousand, four hundred ninety-three".