380243809 has 4 divisors (see below), whose sum is σ = 414811440. Its totient is φ = 345676180.

The previous prime is 380243807. The next prime is 380243887. The reversal of 380243809 is 908342083.

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 380243809 - 2¹ = 380243807 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (380243807) 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, 17283799 + ... + 17283820.

It is an arithmetic number, because the mean of its divisors is an integer number (103702860).

Almost surely, 2^380243809 is an apocalyptic number.

It is an amenable number.

380243809 is a deficient number, since it is larger than the sum of its proper divisors (34567631).

380243809 is a wasteful number, since it uses less digits than its factorization.

380243809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34567630.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 380243809 is about 19499.8412557641. The cubic root of 380243809 is about 724.4705188341.

The spelling of 380243809 in words is "three hundred eighty million, two hundred forty-three thousand, eight hundred nine".