379884809 has 4 divisors (see below), whose sum is σ = 390152004. Its totient is φ = 369617616.

The previous prime is 379884793. The next prime is 379884811. The reversal of 379884809 is 908488973.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 908488973 = 7 ⋅129784139.

It can be written as a sum of positive squares in 2 ways, for example, as 230189584 + 149695225 = 15172^2 + 12235^2 .

It is a cyclic number.

It is not a de Polignac number, because 379884809 - 2⁴ = 379884793 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (379884889) 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, 5133542 + ... + 5133615.

It is an arithmetic number, because the mean of its divisors is an integer number (97538001).

Almost surely, 2^379884809 is an apocalyptic number.

It is an amenable number.

379884809 is a deficient number, since it is larger than the sum of its proper divisors (10267195).

379884809 is a wasteful number, since it uses less digits than its factorization.

379884809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10267194.

The product of its (nonzero) digits is 3483648, while the sum is 56.

The square root of 379884809 is about 19490.6338788660. The cubic root of 379884809 is about 724.2424486640.

The spelling of 379884809 in words is "three hundred seventy-nine million, eight hundred eighty-four thousand, eight hundred nine".