381634609 has 8 divisors (see below), whose sum is σ = 389188800. Its totient is φ = 374093616.

The previous prime is 381634573. The next prime is 381634633. The reversal of 381634609 is 906436183.

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 381634609 - 2¹¹ = 381632561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (381634679) 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, 71574 + ... + 76720.

It is an arithmetic number, because the mean of its divisors is an integer number (48648600).

Almost surely, 2^381634609 is an apocalyptic number.

It is an amenable number.

381634609 is a deficient number, since it is larger than the sum of its proper divisors (7554191).

381634609 is a wasteful number, since it uses less digits than its factorization.

381634609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6599.

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 381634609 is about 19535.4705343895. The cubic root of 381634609 is about 725.3527314111.

The spelling of 381634609 in words is "three hundred eighty-one million, six hundred thirty-four thousand, six hundred nine".