383811949 has 4 divisors (see below), whose sum is σ = 383899936. Its totient is φ = 383723964.

The previous prime is 383811863. The next prime is 383811973. The reversal of 383811949 is 949118383.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 949118383 = 2593 ⋅366031.

It is a cyclic number.

It is not a de Polignac number, because 383811949 - 2⁷ = 383811821 is a prime.

It is a super-2 number, since 2×383811949² = 294623224390357202, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 383811899 and 383811908.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383811049) 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, 37089 + ... + 46294.

It is an arithmetic number, because the mean of its divisors is an integer number (95974984).

Almost surely, 2^383811949 is an apocalyptic number.

It is an amenable number.

383811949 is a deficient number, since it is larger than the sum of its proper divisors (87987).

383811949 is an equidigital number, since it uses as much as digits as its factorization.

383811949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87986.

The product of its digits is 186624, while the sum is 46.

The square root of 383811949 is about 19591.1191359759. The cubic root of 383811949 is about 726.7295679869.

The spelling of 383811949 in words is "three hundred eighty-three million, eight hundred eleven thousand, nine hundred forty-nine".