1243413287 has 2 divisors, whose sum is σ = 1243413288. Its totient is φ = 1243413286.

The previous prime is 1243413277. The next prime is 1243413293. The reversal of 1243413287 is 7823143421.

It is a strong prime.

It is an emirp because it is prime and its reverse (7823143421) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1243413287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1243413217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621706643 + 621706644.

It is an arithmetic number, because the mean of its divisors is an integer number (621706644).

Almost surely, 2^1243413287 is an apocalyptic number.

1243413287 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243413287 is an equidigital number, since it uses as much as digits as its factorization.

1243413287 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 35.

The square root of 1243413287 is about 35262.0658356824. The cubic root of 1243413287 is about 1075.3219261551.

The spelling of 1243413287 in words is "one billion, two hundred forty-three million, four hundred thirteen thousand, two hundred eighty-seven".