383720669 has 4 divisors (see below), whose sum is σ = 384859644. Its totient is φ = 382581696.

The previous prime is 383720639. The next prime is 383720671. The reversal of 383720669 is 966027383.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 220136569 + 163584100 = 14837^2 + 12790^2 .

It is a cyclic number.

It is not a de Polignac number, because 383720669 - 2¹² = 383716573 is a prime.

It is a super-2 number, since 2×383720669² = 294483103635615122, 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 (383720609) 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 3 ways as a sum of consecutive naturals, for example, 568982 + ... + 569655.

It is an arithmetic number, because the mean of its divisors is an integer number (96214911).

Almost surely, 2^383720669 is an apocalyptic number.

It is an amenable number.

383720669 is a deficient number, since it is larger than the sum of its proper divisors (1138975).

383720669 is a wasteful number, since it uses less digits than its factorization.

383720669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1138974.

The product of its (nonzero) digits is 326592, while the sum is 44.

The square root of 383720669 is about 19588.7893704537. The cubic root of 383720669 is about 726.6719519811.

The spelling of 383720669 in words is "three hundred eighty-three million, seven hundred twenty thousand, six hundred sixty-nine".