383799861 has 12 divisors (see below), whose sum is σ = 563466540. Its totient is φ = 251671680.

The previous prime is 383799859. The next prime is 383799869. The reversal of 383799861 is 168997383.

It can be written as a sum of positive squares in 2 ways, for example, as 128119761 + 255680100 = 11319^2 + 15990^2 .

It is not a de Polignac number, because 383799861 - 2¹ = 383799859 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 383799798 and 383799807.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383799869) 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 11 ways as a sum of consecutive naturals, for example, 348996 + ... + 350093.

It is an arithmetic number, because the mean of its divisors is an integer number (46955545).

Almost surely, 2^383799861 is an apocalyptic number.

It is an amenable number.

383799861 is a deficient number, since it is larger than the sum of its proper divisors (179666679).

383799861 is a wasteful number, since it uses less digits than its factorization.

383799861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 699156 (or 699153 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 383799861 is about 19590.8106264136. The cubic root of 383799861 is about 726.7219385569.

The spelling of 383799861 in words is "three hundred eighty-three million, seven hundred ninety-nine thousand, eight hundred sixty-one".