394969493 has 12 divisors (see below), whose sum is σ = 404122788. Its totient is φ = 386000640.

The previous prime is 394969469. The next prime is 394969507.

394969493 is nontrivially palindromic in base 10.

It can be written as a sum of positive squares in 6 ways, for example, as 1423249 + 393546244 = 1193^2 + 19838^2 .

It is not a de Polignac number, because 394969493 - 2²⁶ = 327860629 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 (394969403) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 729803 + ... + 730343.

It is an arithmetic number, because the mean of its divisors is an integer number (33676899).

Almost surely, 2^394969493 is an apocalyptic number.

It is an amenable number.

394969493 is a deficient number, since it is larger than the sum of its proper divisors (9153295).

394969493 is an equidigital number, since it uses as much as digits as its factorization.

394969493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 824 (or 751 counting only the distinct ones).

The product of its digits is 5668704, while the sum is 56.

The square root of 394969493 is about 19873.8394126550. The cubic root of 394969493 is about 733.7045024401.

The spelling of 394969493 in words is "three hundred ninety-four million, nine hundred sixty-nine thousand, four hundred ninety-three".