1313792887 has 16 divisors (see below), whose sum is σ = 1485993600. Its totient is φ = 1150572640.

The previous prime is 1313792849. The next prime is 1313792891. The reversal of 1313792887 is 7882973131.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1313792887 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1313792887.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313792897) 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 15 ways as a sum of consecutive naturals, for example, 144564 + ... + 153382.

It is an arithmetic number, because the mean of its divisors is an integer number (92874600).

Almost surely, 2^1313792887 is an apocalyptic number.

1313792887 is a deficient number, since it is larger than the sum of its proper divisors (172200713).

1313792887 is a wasteful number, since it uses less digits than its factorization.

1313792887 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9326.

The product of its digits is 508032, while the sum is 49.

The square root of 1313792887 is about 36246.2810092291. The cubic root of 1313792887 is about 1095.2391732371.

The spelling of 1313792887 in words is "one billion, three hundred thirteen million, seven hundred ninety-two thousand, eight hundred eighty-seven".