683878399 has 4 divisors (see below), whose sum is σ = 688074136. Its totient is φ = 679682664.

The previous prime is 683878387. The next prime is 683878423. The reversal of 683878399 is 993878386.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 683878399 - 2⁵ = 683878367 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (683878339) 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, 2097624 + ... + 2097949.

It is an arithmetic number, because the mean of its divisors is an integer number (172018534).

Almost surely, 2^683878399 is an apocalyptic number.

683878399 is a deficient number, since it is larger than the sum of its proper divisors (4195737).

683878399 is a wasteful number, since it uses less digits than its factorization.

683878399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4195736.

The product of its digits is 15676416, while the sum is 61.

The square root of 683878399 is about 26151.0687926899. The cubic root of 683878399 is about 881.0345954154.

The spelling of 683878399 in words is "six hundred eighty-three million, eight hundred seventy-eight thousand, three hundred ninety-nine".