687413 has 2 divisors, whose sum is σ = 687414. Its totient is φ = 687412.

The previous prime is 687403. The next prime is 687431. The reversal of 687413 is 314786.

Together with next prime (687431) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 628849 + 58564 = 793^2 + 242^2 .

It is a cyclic number.

It is not a de Polignac number, because 687413 - 2⁴ = 687397 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343706 + 343707.

It is an arithmetic number, because the mean of its divisors is an integer number (343707).

2⁶⁸⁷⁴¹³ is an apocalyptic number.

It is an amenable number.

687413 is a deficient number, since it is larger than the sum of its proper divisors (1).

687413 is an equidigital number, since it uses as much as digits as its factorization.

687413 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4032, while the sum is 29.

The square root of 687413 is about 829.1037329551. The cubic root of 687413 is about 88.2549853133.

The spelling of 687413 in words is "six hundred eighty-seven thousand, four hundred thirteen".