394919493 has 8 divisors (see below), whose sum is σ = 526913856. Its totient is φ = 263102400.

The previous prime is 394919491. The next prime is 394919531.

394919493 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 394919493 - 2¹ = 394919491 is a prime.

It is a super-2 number, since 2×394919493² = 311922811902754098, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394919491) 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 7 ways as a sum of consecutive naturals, for example, 39028 + ... + 48093.

It is an arithmetic number, because the mean of its divisors is an integer number (65864232).

Almost surely, 2^394919493 is an apocalyptic number.

It is an amenable number.

394919493 is a deficient number, since it is larger than the sum of its proper divisors (131994363).

394919493 is a wasteful number, since it uses less digits than its factorization.

394919493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88635.

The product of its digits is 944784, while the sum is 51.

The square root of 394919493 is about 19872.5814377499. The cubic root of 394919493 is about 733.6735407465.

It can be divided in two parts, 39491 and 9493, that added together give a palindrome (48984).

The spelling of 394919493 in words is "three hundred ninety-four million, nine hundred nineteen thousand, four hundred ninety-three".