684071107 has 2 divisors, whose sum is σ = 684071108. Its totient is φ = 684071106.

The previous prime is 684071093. The next prime is 684071131. The reversal of 684071107 is 701170486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 684071107 - 2¹⁵ = 684038339 is a prime.

It is not a weakly prime, because it can be changed into another prime (684071147) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342035553 + 342035554.

It is an arithmetic number, because the mean of its divisors is an integer number (342035554).

Almost surely, 2^684071107 is an apocalyptic number.

684071107 is a deficient number, since it is larger than the sum of its proper divisors (1).

684071107 is an equidigital number, since it uses as much as digits as its factorization.

684071107 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9408, while the sum is 34.

The square root of 684071107 is about 26154.7530479643. The cubic root of 684071107 is about 881.1173423239.

The spelling of 684071107 in words is "six hundred eighty-four million, seventy-one thousand, one hundred seven".