1316081987 has 8 divisors (see below), whose sum is σ = 1511290560. Its totient is φ = 1133467560.

The previous prime is 1316081957. The next prime is 1316082017. The reversal of 1316081987 is 7891806131.

It is an interprime number because it is at equal distance from previous prime (1316081957) and next prime (1316082017).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1316081987 - 2²⁰ = 1315033411 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1316081957) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3148313 + ... + 3148730.

It is an arithmetic number, because the mean of its divisors is an integer number (188911320).

Almost surely, 2^1316081987 is an apocalyptic number.

1316081987 is a deficient number, since it is larger than the sum of its proper divisors (195208573).

1316081987 is a wasteful number, since it uses less digits than its factorization.

1316081987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6297073.

The product of its (nonzero) digits is 72576, while the sum is 44.

The square root of 1316081987 is about 36277.8442992414. The cubic root of 1316081987 is about 1095.8749044158.

The spelling of 1316081987 in words is "one billion, three hundred sixteen million, eighty-one thousand, nine hundred eighty-seven".