381805673 has 4 divisors (see below), whose sum is σ = 381913680. Its totient is φ = 381697668.

The previous prime is 381805661. The next prime is 381805679. The reversal of 381805673 is 376508183.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 381805673 - 2⁶ = 381805609 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 381805673.

It is not an unprimeable number, because it can be changed into a prime (381805679) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48515 + ... + 55832.

It is an arithmetic number, because the mean of its divisors is an integer number (95478420).

Almost surely, 2^381805673 is an apocalyptic number.

It is an amenable number.

381805673 is a deficient number, since it is larger than the sum of its proper divisors (108007).

381805673 is a wasteful number, since it uses less digits than its factorization.

381805673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108006.

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 381805673 is about 19539.8483361566. The cubic root of 381805673 is about 725.4610926567.

The spelling of 381805673 in words is "three hundred eighty-one million, eight hundred five thousand, six hundred seventy-three".