2172477917 has 8 divisors (see below), whose sum is σ = 2291832000. Its totient is φ = 2053625184.

The previous prime is 2172477893. The next prime is 2172477941. The reversal of 2172477917 is 7197742712.

It is an interprime number because it is at equal distance from previous prime (2172477893) and next prime (2172477941).

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

It is a de Polignac number, because none of the positive numbers 2^k-2172477917 is a prime.

It is a super-3 number, since 3×2172477917³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2172477017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116417 + ... + 133782.

It is an arithmetic number, because the mean of its divisors is an integer number (286479000).

Almost surely, 2^2172477917 is an apocalyptic number.

It is an amenable number.

2172477917 is a deficient number, since it is larger than the sum of its proper divisors (119354083).

2172477917 is a wasteful number, since it uses less digits than its factorization.

2172477917 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250675.

The product of its digits is 345744, while the sum is 47.

The square root of 2172477917 is about 46609.8478542893. The cubic root of 2172477917 is about 1295.1451896664.

The spelling of 2172477917 in words is "two billion, one hundred seventy-two million, four hundred seventy-seven thousand, nine hundred seventeen".