684911289 has 8 divisors (see below), whose sum is σ = 914969952. Its totient is φ = 455730080.

The previous prime is 684911287. The next prime is 684911309. The reversal of 684911289 is 982119486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 684911289 - 2¹ = 684911287 is a prime.

It is not an unprimeable number, because it can be changed into a prime (684911287) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 217539 + ... + 220664.

It is an arithmetic number, because the mean of its divisors is an integer number (114371244).

Almost surely, 2^684911289 is an apocalyptic number.

It is an amenable number.

684911289 is a deficient number, since it is larger than the sum of its proper divisors (230058663).

684911289 is a wasteful number, since it uses less digits than its factorization.

684911289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438727.

The product of its digits is 248832, while the sum is 48.

The square root of 684911289 is about 26170.8098651914. The cubic root of 684911289 is about 881.4779266986.

The spelling of 684911289 in words is "six hundred eighty-four million, nine hundred eleven thousand, two hundred eighty-nine".