1717485987 has 16 divisors (see below), whose sum is σ = 2618922240. Its totient is φ = 980745312.

The previous prime is 1717485947. The next prime is 1717485989. The reversal of 1717485987 is 7895847171.

It is a de Polignac number, because none of the positive numbers 2^k-1717485987 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1717485989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3964 + ... + 58742.

It is an arithmetic number, because the mean of its divisors is an integer number (163682640).

Almost surely, 2^1717485987 is an apocalyptic number.

1717485987 is a deficient number, since it is larger than the sum of its proper divisors (901436253).

1717485987 is a wasteful number, since it uses less digits than its factorization.

1717485987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56282.

The product of its digits is 3951360, while the sum is 57.

The square root of 1717485987 is about 41442.5625052313. The cubic root of 1717485987 is about 1197.5612477917.

The spelling of 1717485987 in words is "one billion, seven hundred seventeen million, four hundred eighty-five thousand, nine hundred eighty-seven".