387181081 has 8 divisors (see below), whose sum is σ = 453285504. Its totient is φ = 323774880.

The previous prime is 387181079. The next prime is 387181097. The reversal of 387181081 is 180181783.

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

It is a cyclic number.

It is not a de Polignac number, because 387181081 - 2¹ = 387181079 is a prime.

It is a super-2 number, since 2×387181081² = 299818378968657122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 387181081.

It is not an unprimeable number, because it can be changed into a prime (387181051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 674245 + ... + 674818.

It is an arithmetic number, because the mean of its divisors is an integer number (56660688).

Almost surely, 2^387181081 is an apocalyptic number.

It is an amenable number.

387181081 is a deficient number, since it is larger than the sum of its proper divisors (66104423).

387181081 is a wasteful number, since it uses less digits than its factorization.

387181081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1349111.

The product of its (nonzero) digits is 10752, while the sum is 37.

The square root of 387181081 is about 19676.9174669205. The cubic root of 387181081 is about 728.8498062618.

The spelling of 387181081 in words is "three hundred eighty-seven million, one hundred eighty-one thousand, eighty-one".