383438709 has 12 divisors (see below), whose sum is σ = 554036652. Its totient is φ = 255542400.

The previous prime is 383438701. The next prime is 383438747. The reversal of 383438709 is 907834383.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 121484484 + 261954225 = 11022^2 + 16185^2 .

It is not a de Polignac number, because 383438709 - 2³ = 383438701 is a prime.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383438701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 36379 + ... + 45719.

It is an arithmetic number, because the mean of its divisors is an integer number (46169721).

Almost surely, 2^383438709 is an apocalyptic number.

It is an amenable number.

383438709 is a deficient number, since it is larger than the sum of its proper divisors (170597943).

383438709 is a wasteful number, since it uses less digits than its factorization.

383438709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13908 (or 13905 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 45.

The square root of 383438709 is about 19581.5910742718. The cubic root of 383438709 is about 726.4939208889.

The spelling of 383438709 in words is "three hundred eighty-three million, four hundred thirty-eight thousand, seven hundred nine".