1243696381087 has 4 divisors (see below), whose sum is σ = 1244548813240. Its totient is φ = 1242843948936.

The previous prime is 1243696381019. The next prime is 1243696381093. The reversal of 1243696381087 is 7801836963421.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1243696381087 - 2¹⁵ = 1243696348319 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1243696381387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 426213888 + ... + 426216805.

It is an arithmetic number, because the mean of its divisors is an integer number (311137203310).

Almost surely, 2^{1243696381087} is an apocalyptic number.

1243696381087 is a deficient number, since it is larger than the sum of its proper divisors (852432153).

1243696381087 is an equidigital number, since it uses as much as digits as its factorization.

1243696381087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 852432152.

The product of its (nonzero) digits is 10450944, while the sum is 58.

The spelling of 1243696381087 in words is "one trillion, two hundred forty-three billion, six hundred ninety-six million, three hundred eighty-one thousand, eighty-seven".