1331313001987 has 2 divisors, whose sum is σ = 1331313001988. Its totient is φ = 1331313001986.

The previous prime is 1331313001981. The next prime is 1331313002083. The reversal of 1331313001987 is 7891003131331.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1331313001987 - 2²⁷ = 1331178784259 is a prime.

It is not a weakly prime, because it can be changed into another prime (1331313001981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 665656500993 + 665656500994.

It is an arithmetic number, because the mean of its divisors is an integer number (665656500994).

Almost surely, 2^{1331313001987} is an apocalyptic number.

1331313001987 is a deficient number, since it is larger than the sum of its proper divisors (1).

1331313001987 is an equidigital number, since it uses as much as digits as its factorization.

1331313001987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The spelling of 1331313001987 in words is "one trillion, three hundred thirty-one billion, three hundred thirteen million, one thousand, nine hundred eighty-seven".