383690861 has 4 divisors (see below), whose sum is σ = 383957472. Its totient is φ = 383424252.

The previous prime is 383690821. The next prime is 383690863. The reversal of 383690861 is 168096383.

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 a cyclic number.

It is not a de Polignac number, because 383690861 - 2¹⁰ = 383689837 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 (383690863) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131135 + ... + 134028.

It is an arithmetic number, because the mean of its divisors is an integer number (95989368).

Almost surely, 2^383690861 is an apocalyptic number.

It is an amenable number.

383690861 is a deficient number, since it is larger than the sum of its proper divisors (266611).

383690861 is a wasteful number, since it uses less digits than its factorization.

383690861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266610.

The product of its (nonzero) digits is 186624, while the sum is 44.

The square root of 383690861 is about 19588.0285123338. The cubic root of 383690861 is about 726.6531351697.

The spelling of 383690861 in words is "three hundred eighty-three million, six hundred ninety thousand, eight hundred sixty-one".