383604381 has 6 divisors (see below), whose sum is σ = 554095230. Its totient is φ = 255736248.

The previous prime is 383604379. The next prime is 383604391. The reversal of 383604381 is 183406383.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 371178756 + 12425625 = 19266^2 + 3525^2 .

It is not a de Polignac number, because 383604381 - 2¹ = 383604379 is a prime.

It is a super-2 number, since 2×383604381² = 294304642244786322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (383604311) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21311346 + ... + 21311363.

It is an arithmetic number, because the mean of its divisors is an integer number (92349205).

Almost surely, 2^383604381 is an apocalyptic number.

It is an amenable number.

383604381 is a deficient number, since it is larger than the sum of its proper divisors (170490849).

383604381 is a wasteful number, since it uses less digits than its factorization.

383604381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42622715 (or 42622712 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 36.

The square root of 383604381 is about 19585.8209171839. The cubic root of 383604381 is about 726.5985376700.

The spelling of 383604381 in words is "three hundred eighty-three million, six hundred four thousand, three hundred eighty-one".