1317774887 has 32 divisors (see below), whose sum is σ = 1656560640. Its totient is φ = 1030320000.

The previous prime is 1317774859. The next prime is 1317774889. The reversal of 1317774887 is 7884777131.

It is a cyclic number.

It is not a de Polignac number, because 1317774887 - 2⁸ = 1317774631 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 (1317774889) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161762 + ... + 169712.

It is an arithmetic number, because the mean of its divisors is an integer number (51767520).

Almost surely, 2^1317774887 is an apocalyptic number.

1317774887 is a deficient number, since it is larger than the sum of its proper divisors (338785753).

1317774887 is a wasteful number, since it uses less digits than its factorization.

1317774887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8055.

The product of its digits is 1843968, while the sum is 53.

The square root of 1317774887 is about 36301.1692235939. The cubic root of 1317774887 is about 1096.3445843066.

The spelling of 1317774887 in words is "one billion, three hundred seventeen million, seven hundred seventy-four thousand, eight hundred eighty-seven".