383996181 has 4 divisors (see below), whose sum is σ = 511994912. Its totient is φ = 255997452.

The previous prime is 383996161. The next prime is 383996203. The reversal of 383996181 is 181699383.

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 not a de Polignac number, because 383996181 - 2¹⁷ = 383865109 is a prime.

It is a super-2 number, since 2×383996181² = 294906134045169522, which contains 22 as substring.

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 383996181.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383996161) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63999361 + ... + 63999366.

It is an arithmetic number, because the mean of its divisors is an integer number (127998728).

Almost surely, 2^383996181 is an apocalyptic number.

It is an amenable number.

383996181 is a deficient number, since it is larger than the sum of its proper divisors (127998731).

383996181 is a wasteful number, since it uses less digits than its factorization.

383996181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127998730.

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

The square root of 383996181 is about 19595.8204982593. The cubic root of 383996181 is about 726.8458275472.

The spelling of 383996181 in words is "three hundred eighty-three million, nine hundred ninety-six thousand, one hundred eighty-one".