686280305437 has 2 divisors, whose sum is σ = 686280305438. Its totient is φ = 686280305436.

The previous prime is 686280305351. The next prime is 686280305443. The reversal of 686280305437 is 734503082686.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 571393880836 + 114886424601 = 755906^2 + 338949^2 .

It is a cyclic number.

It is not a de Polignac number, because 686280305437 - 2²³ = 686271916829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (686280305467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343140152718 + 343140152719.

It is an arithmetic number, because the mean of its divisors is an integer number (343140152719).

Almost surely, 2^686280305437 is an apocalyptic number.

It is an amenable number.

686280305437 is a deficient number, since it is larger than the sum of its proper divisors (1).

686280305437 is an equidigital number, since it uses as much as digits as its factorization.

686280305437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5806080, while the sum is 52.

The spelling of 686280305437 in words is "six hundred eighty-six billion, two hundred eighty million, three hundred five thousand, four hundred thirty-seven".