1343638687 has 2 divisors, whose sum is σ = 1343638688. Its totient is φ = 1343638686.

The previous prime is 1343638663. The next prime is 1343638691. The reversal of 1343638687 is 7868363431.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (7868363431) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1343638687 - 2⁷ = 1343638559 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1343638687.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1343635687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 671819343 + 671819344.

It is an arithmetic number, because the mean of its divisors is an integer number (671819344).

Almost surely, 2^1343638687 is an apocalyptic number.

1343638687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1343638687 is an equidigital number, since it uses as much as digits as its factorization.

1343638687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1741824, while the sum is 49.

The square root of 1343638687 is about 36655.6774183755. The cubic root of 1343638687 is about 1103.4707693112.

The spelling of 1343638687 in words is "one billion, three hundred forty-three million, six hundred thirty-eight thousand, six hundred eighty-seven".