383874981 has 8 divisors (see below), whose sum is σ = 584952384. Its totient is φ = 219357120.

The previous prime is 383874979. The next prime is 383875003. The reversal of 383874981 is 189478383.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 383874981 - 2¹ = 383874979 is a prime.

It is a super-2 number, since 2×383874981² = 294720002075500722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383874901) 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 7 ways as a sum of consecutive naturals, for example, 9139860 + ... + 9139901.

It is an arithmetic number, because the mean of its divisors is an integer number (73119048).

Almost surely, 2^383874981 is an apocalyptic number.

It is an amenable number.

383874981 is a deficient number, since it is larger than the sum of its proper divisors (201077403).

383874981 is a wasteful number, since it uses less digits than its factorization.

383874981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18279771.

The product of its digits is 1161216, while the sum is 51.

The square root of 383874981 is about 19592.7277580229. The cubic root of 383874981 is about 726.7693485017.

The spelling of 383874981 in words is "three hundred eighty-three million, eight hundred seventy-four thousand, nine hundred eighty-one".