684423611 has 4 divisors (see below), whose sum is σ = 706501824. Its totient is φ = 662345400.

The previous prime is 684423601. The next prime is 684423613. The reversal of 684423611 is 116324486.

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 684423611 - 2⁶ = 684423547 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684423613) 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, 11039060 + ... + 11039121.

It is an arithmetic number, because the mean of its divisors is an integer number (176625456).

Almost surely, 2^684423611 is an apocalyptic number.

684423611 is a deficient number, since it is larger than the sum of its proper divisors (22078213).

684423611 is a wasteful number, since it uses less digits than its factorization.

684423611 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22078212.

The product of its digits is 27648, while the sum is 35.

The square root of 684423611 is about 26161.4909934430. The cubic root of 684423611 is about 881.2686638503.

The spelling of 684423611 in words is "six hundred eighty-four million, four hundred twenty-three thousand, six hundred eleven".