1487349942809 has 2 divisors, whose sum is σ = 1487349942810. Its totient is φ = 1487349942808.

The previous prime is 1487349942797. The next prime is 1487349942817. The reversal of 1487349942809 is 9082499437841.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 957125675584 + 530224267225 = 978328^2 + 728165^2 .

It is an emirp because it is prime and its reverse (9082499437841) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1487349942809 is a prime.

It is not a weakly prime, because it can be changed into another prime (1487349942209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 743674971404 + 743674971405.

It is an arithmetic number, because the mean of its divisors is an integer number (743674971405).

Almost surely, 2^{1487349942809} is an apocalyptic number.

It is an amenable number.

1487349942809 is a deficient number, since it is larger than the sum of its proper divisors (1).

1487349942809 is an equidigital number, since it uses as much as digits as its factorization.

1487349942809 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 125411328, while the sum is 68.

The spelling of 1487349942809 in words is "one trillion, four hundred eighty-seven billion, three hundred forty-nine million, nine hundred forty-two thousand, eight hundred nine".