383199861 has 48 divisors (see below), whose sum is σ = 584484992. Its totient is φ = 222963840.

The previous prime is 383199857. The next prime is 383199877. The reversal of 383199861 is 168991383.

It is not a de Polignac number, because 383199861 - 2² = 383199857 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 383199861.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383199811) 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 47 ways as a sum of consecutive naturals, for example, 1383255 + ... + 1383531.

Almost surely, 2^383199861 is an apocalyptic number.

It is an amenable number.

383199861 is a deficient number, since it is larger than the sum of its proper divisors (201285131).

383199861 is a wasteful number, since it uses less digits than its factorization.

383199861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 442 (or 431 counting only the distinct ones).

The product of its digits is 279936, while the sum is 48.

The square root of 383199861 is about 19575.4913348299. The cubic root of 383199861 is about 726.3430426582.

The spelling of 383199861 in words is "three hundred eighty-three million, one hundred ninety-nine thousand, eight hundred sixty-one".