687113461 has 2 divisors, whose sum is σ = 687113462. Its totient is φ = 687113460.

The previous prime is 687113459. The next prime is 687113489. The reversal of 687113461 is 164311786.

687113461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 559559025 + 127554436 = 23655^2 + 11294^2 .

It is a cyclic number.

It is not a de Polignac number, because 687113461 - 2¹ = 687113459 is a prime.

Together with 687113459, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 687113461.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (687113261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343556730 + 343556731.

It is an arithmetic number, because the mean of its divisors is an integer number (343556731).

Almost surely, 2^687113461 is an apocalyptic number.

It is an amenable number.

687113461 is a deficient number, since it is larger than the sum of its proper divisors (1).

687113461 is an equidigital number, since it uses as much as digits as its factorization.

687113461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 24192, while the sum is 37.

The square root of 687113461 is about 26212.8491583803. The cubic root of 687113461 is about 882.4216446628.

The spelling of 687113461 in words is "six hundred eighty-seven million, one hundred thirteen thousand, four hundred sixty-one".