687404087 has 2 divisors, whose sum is σ = 687404088. Its totient is φ = 687404086.

The previous prime is 687404083. The next prime is 687404131. The reversal of 687404087 is 780404786.

It is an a-pointer prime, because the next prime (687404131) can be obtained adding 687404087 to its sum of digits (44).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 687404087 - 2² = 687404083 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687404083) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343702043 + 343702044.

It is an arithmetic number, because the mean of its divisors is an integer number (343702044).

Almost surely, 2^687404087 is an apocalyptic number.

687404087 is a deficient number, since it is larger than the sum of its proper divisors (1).

687404087 is an equidigital number, since it uses as much as digits as its factorization.

687404087 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 301056, while the sum is 44.

The square root of 687404087 is about 26218.3921513124. The cubic root of 687404087 is about 882.5460387349.

It can be divided in two parts, 68740 and 4087, that added together give a palindrome (72827).

The spelling of 687404087 in words is "six hundred eighty-seven million, four hundred four thousand, eighty-seven".