381817617 has 8 divisors (see below), whose sum is σ = 509185824. Its totient is φ = 254497248.

The previous prime is 381817609. The next prime is 381817619. The reversal of 381817617 is 716718183.

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

It is not a de Polignac number, because 381817617 - 2³ = 381817609 is a prime.

It is not an unprimeable number, because it can be changed into a prime (381817619) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16018 + ... + 31940.

It is an arithmetic number, because the mean of its divisors is an integer number (63648228).

Almost surely, 2^381817617 is an apocalyptic number.

It is an amenable number.

381817617 is a deficient number, since it is larger than the sum of its proper divisors (127368207).

381817617 is a wasteful number, since it uses less digits than its factorization.

381817617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23919.

The product of its digits is 56448, while the sum is 42.

The square root of 381817617 is about 19540.1539656165. The cubic root of 381817617 is about 725.4686574272.

The spelling of 381817617 in words is "three hundred eighty-one million, eight hundred seventeen thousand, six hundred seventeen".