684502087 has 2 divisors, whose sum is σ = 684502088. Its totient is φ = 684502086.

The previous prime is 684502043. The next prime is 684502097. The reversal of 684502087 is 780205486.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 684502087 - 2¹¹ = 684500039 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684502097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342251043 + 342251044.

It is an arithmetic number, because the mean of its divisors is an integer number (342251044).

Almost surely, 2^684502087 is an apocalyptic number.

684502087 is a deficient number, since it is larger than the sum of its proper divisors (1).

684502087 is an equidigital number, since it uses as much as digits as its factorization.

684502087 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 107520, while the sum is 40.

The square root of 684502087 is about 26162.9907885165. The cubic root of 684502087 is about 881.3023446466.

The spelling of 684502087 in words is "six hundred eighty-four million, five hundred two thousand, eighty-seven".