394646493 has 4 divisors (see below), whose sum is σ = 526195328. Its totient is φ = 263097660.

The previous prime is 394646479. The next prime is 394646501.

394646493 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 not a de Polignac number, because 394646493 - 2⁸ = 394646237 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 (394646453) 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, 65774413 + ... + 65774418.

It is an arithmetic number, because the mean of its divisors is an integer number (131548832).

Almost surely, 2^394646493 is an apocalyptic number.

It is an amenable number.

394646493 is a deficient number, since it is larger than the sum of its proper divisors (131548835).

394646493 is a wasteful number, since it uses less digits than its factorization.

394646493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131548834.

The product of its digits is 1679616, while the sum is 48.

The square root of 394646493 is about 19865.7114899014. The cubic root of 394646493 is about 733.5044437949.

The spelling of 394646493 in words is "three hundred ninety-four million, six hundred forty-six thousand, four hundred ninety-three".