581670381 has 8 divisors (see below), whose sum is σ = 781140640. Its totient is φ = 384990192.

The previous prime is 581670379. The next prime is 581670407. The reversal of 581670381 is 183076185.

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

It is not a de Polignac number, because 581670381 - 2¹ = 581670379 is a prime.

It is a super-2 number, since 2×581670381² = 676680864265370322, which contains 22 as substring.

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

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (581670311) 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, 697030 + ... + 697863.

It is an arithmetic number, because the mean of its divisors is an integer number (97642580).

Almost surely, 2^581670381 is an apocalyptic number.

It is an amenable number.

581670381 is a deficient number, since it is larger than the sum of its proper divisors (199470259).

581670381 is a wasteful number, since it uses less digits than its factorization.

581670381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1395035.

The product of its (nonzero) digits is 40320, while the sum is 39.

The square root of 581670381 is about 24117.8436225132. The cubic root of 581670381 is about 834.7549119935.

The spelling of 581670381 in words is "five hundred eighty-one million, six hundred seventy thousand, three hundred eighty-one".