506678399 has 4 divisors (see below), whose sum is σ = 506735664. Its totient is φ = 506621136.

The previous prime is 506678329. The next prime is 506678411. The reversal of 506678399 is 993876605.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 506678399 - 2²⁴ = 489901183 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 506678399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (506678329) 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, 12227 + ... + 34100.

It is an arithmetic number, because the mean of its divisors is an integer number (126683916).

Almost surely, 2^506678399 is an apocalyptic number.

506678399 is a deficient number, since it is larger than the sum of its proper divisors (57265).

506678399 is a wasteful number, since it uses less digits than its factorization.

506678399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57264.

The product of its (nonzero) digits is 2449440, while the sum is 53.

The square root of 506678399 is about 22509.5179646300. The cubic root of 506678399 is about 797.2186743028.

The spelling of 506678399 in words is "five hundred six million, six hundred seventy-eight thousand, three hundred ninety-nine".