383920709 has 4 divisors (see below), whose sum is σ = 396305280. Its totient is φ = 371536140.

The previous prime is 383920697. The next prime is 383920721. The reversal of 383920709 is 907029383.

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 an interprime number because it is at equal distance from previous prime (383920697) and next prime (383920721).

It is a cyclic number.

It is not a de Polignac number, because 383920709 - 2²⁴ = 367143493 is a prime.

It is a super-2 number, since 2×383920709² = 294790221598125362, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383920739) 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 3 ways as a sum of consecutive naturals, for example, 6192239 + ... + 6192300.

It is an arithmetic number, because the mean of its divisors is an integer number (99076320).

Almost surely, 2^383920709 is an apocalyptic number.

It is an amenable number.

383920709 is a deficient number, since it is larger than the sum of its proper divisors (12384571).

383920709 is a wasteful number, since it uses less digits than its factorization.

383920709 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12384570.

The product of its (nonzero) digits is 81648, while the sum is 41.

The square root of 383920709 is about 19593.8946868661. The cubic root of 383920709 is about 726.7982054568.

The spelling of 383920709 in words is "three hundred eighty-three million, nine hundred twenty thousand, seven hundred nine".