381079821 has 8 divisors (see below), whose sum is σ = 508256320. Its totient is φ = 253978272.

The previous prime is 381079817. The next prime is 381079823. The reversal of 381079821 is 128970183.

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

It is not a de Polignac number, because 381079821 - 2² = 381079817 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 381079821.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (381079823) 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, 5545 + ... + 28158.

It is an arithmetic number, because the mean of its divisors is an integer number (63532040).

Almost surely, 2^381079821 is an apocalyptic number.

It is an amenable number.

381079821 is a deficient number, since it is larger than the sum of its proper divisors (127176499).

381079821 is a wasteful number, since it uses less digits than its factorization.

381079821 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37475.

The product of its (nonzero) digits is 24192, while the sum is 39.

The square root of 381079821 is about 19521.2658657168. The cubic root of 381079821 is about 725.0010755434.

The spelling of 381079821 in words is "three hundred eighty-one million, seventy-nine thousand, eight hundred twenty-one".