1311092487 has 20 divisors (see below), whose sum is σ = 1962353800. Its totient is φ = 872362224.

The previous prime is 1311092467. The next prime is 1311092491. The reversal of 1311092487 is 7842901131.

It is a happy number.

1311092487 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 1311092487 - 2⁶ = 1311092423 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311092467) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26889 + ... + 57837.

It is an arithmetic number, because the mean of its divisors is an integer number (98117690).

Almost surely, 2^1311092487 is an apocalyptic number.

1311092487 is a deficient number, since it is larger than the sum of its proper divisors (651261313).

1311092487 is an equidigital number, since it uses as much as digits as its factorization.

1311092487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31484 (or 31475 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 36.

The square root of 1311092487 is about 36209.0111298279. The cubic root of 1311092487 is about 1094.4882652942.

The spelling of 1311092487 in words is "one billion, three hundred eleven million, ninety-two thousand, four hundred eighty-seven".