684137707 has 8 divisors (see below), whose sum is σ = 746536752. Its totient is φ = 621772800.

The previous prime is 684137689. The next prime is 684137723. The reversal of 684137707 is 707731486.

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

It is not a de Polignac number, because 684137707 - 2¹¹ = 684135659 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684137107) 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, 52203 + ... + 63979.

It is an arithmetic number, because the mean of its divisors is an integer number (93317094).

Almost surely, 2^684137707 is an apocalyptic number.

684137707 is a deficient number, since it is larger than the sum of its proper divisors (62399045).

684137707 is a wasteful number, since it uses less digits than its factorization.

684137707 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17069.

The product of its (nonzero) digits is 197568, while the sum is 43.

The square root of 684137707 is about 26156.0262081227. The cubic root of 684137707 is about 881.1459360914.

The spelling of 684137707 in words is "six hundred eighty-four million, one hundred thirty-seven thousand, seven hundred seven".