1705216117 has 16 divisors (see below), whose sum is σ = 1941589440. Its totient is φ = 1483830400.

The previous prime is 1705216109. The next prime is 1705216133. The reversal of 1705216117 is 7116125071.

It is a happy number.

It is not a de Polignac number, because 1705216117 - 2³ = 1705216109 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1705216157) 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, 11767 + ... + 59572.

It is an arithmetic number, because the mean of its divisors is an integer number (121349340).

Almost surely, 2^1705216117 is an apocalyptic number.

It is an amenable number.

1705216117 is a deficient number, since it is larger than the sum of its proper divisors (236373323).

1705216117 is a wasteful number, since it uses less digits than its factorization.

1705216117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 71444.

The product of its (nonzero) digits is 2940, while the sum is 31.

The square root of 1705216117 is about 41294.2625191442. The cubic root of 1705216117 is about 1194.7026020667.

The spelling of 1705216117 in words is "one billion, seven hundred five million, two hundred sixteen thousand, one hundred seventeen".