684109297 has 8 divisors (see below), whose sum is σ = 689123520. Its totient is φ = 679107600.

The previous prime is 684109289. The next prime is 684109301. The reversal of 684109297 is 792901486.

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 684109297 - 2³ = 684109289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684109247) 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, 125172 + ... + 130522.

It is an arithmetic number, because the mean of its divisors is an integer number (86140440).

Almost surely, 2^684109297 is an apocalyptic number.

It is an amenable number.

684109297 is a deficient number, since it is larger than the sum of its proper divisors (5014223).

684109297 is a wasteful number, since it uses less digits than its factorization.

684109297 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6263.

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 684109297 is about 26155.4831154005. The cubic root of 684109297 is about 881.1337388869.

The spelling of 684109297 in words is "six hundred eighty-four million, one hundred nine thousand, two hundred ninety-seven".