2017720117 has 8 divisors (see below), whose sum is σ = 2312576000. Its totient is φ = 1724516784.

The previous prime is 2017720093. The next prime is 2017720141. The reversal of 2017720117 is 7110277102.

It is an interprime number because it is at equal distance from previous prime (2017720093) and next prime (2017720141).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2017720117 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2017720147) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 410517 + ... + 415402.

It is an arithmetic number, because the mean of its divisors is an integer number (289072000).

Almost surely, 2^2017720117 is an apocalyptic number.

It is an amenable number.

2017720117 is a deficient number, since it is larger than the sum of its proper divisors (294855883).

2017720117 is an equidigital number, since it uses as much as digits as its factorization.

2017720117 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 826275.

The product of its (nonzero) digits is 1372, while the sum is 28.

The square root of 2017720117 is about 44919.0395823419. The cubic root of 2017720117 is about 1263.6311056720.

Adding to 2017720117 its reverse (7110277102), we get a palindrome (9127997219).

The spelling of 2017720117 in words is "two billion, seventeen million, seven hundred twenty thousand, one hundred seventeen".