678596069 has 4 divisors (see below), whose sum is σ = 682149120. Its totient is φ = 675043020.

The previous prime is 678596063. The next prime is 678596081. The reversal of 678596069 is 960695876.

678596069 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 678596069 - 2¹⁶ = 678530533 is a prime.

It is a super-2 number, since 2×678596069² = 920985249724505522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (678596063) 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, 1776239 + ... + 1776620.

It is an arithmetic number, because the mean of its divisors is an integer number (170537280).

Almost surely, 2^678596069 is an apocalyptic number.

It is an amenable number.

678596069 is a deficient number, since it is larger than the sum of its proper divisors (3553051).

678596069 is a wasteful number, since it uses less digits than its factorization.

678596069 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3553050.

The product of its (nonzero) digits is 4898880, while the sum is 56.

The square root of 678596069 is about 26049.8765640070. The cubic root of 678596069 is about 878.7603365376.

The spelling of 678596069 in words is "six hundred seventy-eight million, five hundred ninety-six thousand, sixty-nine".