393244769 has 8 divisors (see below), whose sum is σ = 404167848. Its totient is φ = 382337280.

The previous prime is 393244759. The next prime is 393244781. The reversal of 393244769 is 967442393.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 37356544 + 355888225 = 6112^2 + 18865^2 .

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

It is not a de Polignac number, because 393244769 - 2⁸ = 393244513 is a prime.

It is a super-2 number, since 2×393244769² = 309282896691726722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (393244759) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 62759 + ... + 68739.

It is an arithmetic number, because the mean of its divisors is an integer number (50520981).

Almost surely, 2^393244769 is an apocalyptic number.

It is an amenable number.

393244769 is a deficient number, since it is larger than the sum of its proper divisors (10923079).

393244769 is a wasteful number, since it uses less digits than its factorization.

393244769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7795.

The product of its digits is 979776, while the sum is 47.

The square root of 393244769 is about 19830.4001220349. The cubic root of 393244769 is about 732.6349817060.

The spelling of 393244769 in words is "three hundred ninety-three million, two hundred forty-four thousand, seven hundred sixty-nine".