684450007 has 2 divisors, whose sum is σ = 684450008. Its totient is φ = 684450006.

The previous prime is 684449959. The next prime is 684450017. The reversal of 684450007 is 700054486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 684450007 - 2⁷ = 684449879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684450017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342225003 + 342225004.

It is an arithmetic number, because the mean of its divisors is an integer number (342225004).

Almost surely, 2^684450007 is an apocalyptic number.

684450007 is a deficient number, since it is larger than the sum of its proper divisors (1).

684450007 is an equidigital number, since it uses as much as digits as its factorization.

684450007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 684450007 is about 26161.9954705294. The cubic root of 684450007 is about 881.2799929299.

The spelling of 684450007 in words is "six hundred eighty-four million, four hundred fifty thousand, seven".