1311109487 has 2 divisors, whose sum is σ = 1311109488. Its totient is φ = 1311109486.

The previous prime is 1311109477. The next prime is 1311109493. The reversal of 1311109487 is 7849011131.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1311109487 - 2²⁰ = 1310060911 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1311109447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 655554743 + 655554744.

It is an arithmetic number, because the mean of its divisors is an integer number (655554744).

Almost surely, 2^1311109487 is an apocalyptic number.

1311109487 is a deficient number, since it is larger than the sum of its proper divisors (1).

1311109487 is an equidigital number, since it uses as much as digits as its factorization.

1311109487 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6048, while the sum is 35.

The square root of 1311109487 is about 36209.2458772618. The cubic root of 1311109487 is about 1094.4929957563.

The spelling of 1311109487 in words is "one billion, three hundred eleven million, one hundred nine thousand, four hundred eighty-seven".