17417987897 has 4 divisors (see below), whose sum is σ = 17555137536. Its totient is φ = 17280838260.

The previous prime is 17417987879. The next prime is 17417987921. The reversal of 17417987897 is 79878971471.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 17417987897 - 2⁶ = 17417987833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (17417987827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68574629 + ... + 68574882.

It is an arithmetic number, because the mean of its divisors is an integer number (4388784384).

Almost surely, 2^17417987897 is an apocalyptic number.

It is an amenable number.

17417987897 is a deficient number, since it is larger than the sum of its proper divisors (137149639).

17417987897 is a wasteful number, since it uses less digits than its factorization.

17417987897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137149638.

The product of its digits is 49787136, while the sum is 68.

The spelling of 17417987897 in words is "seventeen billion, four hundred seventeen million, nine hundred eighty-seven thousand, eight hundred ninety-seven".