687422369329 has 2 divisors, whose sum is σ = 687422369330. Its totient is φ = 687422369328.

The previous prime is 687422369327. The next prime is 687422369363. The reversal of 687422369329 is 923963224786.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 568852333729 + 118570035600 = 754223^2 + 344340^2 .

It is a cyclic number.

It is not a de Polignac number, because 687422369329 - 2¹ = 687422369327 is a prime.

Together with 687422369327, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (687422369327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 343711184664 + 343711184665.

It is an arithmetic number, because the mean of its divisors is an integer number (343711184665).

Almost surely, 2^687422369329 is an apocalyptic number.

It is an amenable number.

687422369329 is a deficient number, since it is larger than the sum of its proper divisors (1).

687422369329 is an equidigital number, since it uses as much as digits as its factorization.

687422369329 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47029248, while the sum is 61.

The spelling of 687422369329 in words is "six hundred eighty-seven billion, four hundred twenty-two million, three hundred sixty-nine thousand, three hundred twenty-nine".