378583409 has 4 divisors (see below), whose sum is σ = 380167680. Its totient is φ = 376999140.

The previous prime is 378583397. The next prime is 378583423. The reversal of 378583409 is 904385873.

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 a de Polignac number, because none of the positive numbers 2^k-378583409 is a prime.

It is a super-2 number, since 2×378583409² = 286650795140122562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (378583609) 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, 791777 + ... + 792254.

It is an arithmetic number, because the mean of its divisors is an integer number (95041920).

Almost surely, 2^378583409 is an apocalyptic number.

It is an amenable number.

378583409 is a deficient number, since it is larger than the sum of its proper divisors (1584271).

378583409 is a wasteful number, since it uses less digits than its factorization.

378583409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1584270.

The product of its (nonzero) digits is 725760, while the sum is 47.

The square root of 378583409 is about 19457.2199710031. The cubic root of 378583409 is about 723.4144718219.

The spelling of 378583409 in words is "three hundred seventy-eight million, five hundred eighty-three thousand, four hundred nine".