172172419 has 4 divisors (see below), whose sum is σ = 177726400. Its totient is φ = 166618440.

The previous prime is 172172401. The next prime is 172172437. The reversal of 172172419 is 914271271.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 914271271 = 17 ⋅53780663.

It is an interprime number because it is at equal distance from previous prime (172172401) and next prime (172172437).

It is a cyclic number.

It is not a de Polignac number, because 172172419 - 2¹³ = 172164227 is a prime.

It is a super-2 number, since 2×172172419² = 59286683728623122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (172176419) 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, 2776944 + ... + 2777005.

It is an arithmetic number, because the mean of its divisors is an integer number (44431600).

Almost surely, 2^172172419 is an apocalyptic number.

172172419 is a deficient number, since it is larger than the sum of its proper divisors (5553981).

172172419 is an equidigital number, since it uses as much as digits as its factorization.

172172419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5553980.

The product of its digits is 7056, while the sum is 34.

The square root of 172172419 is about 13121.4488148222. The cubic root of 172172419 is about 556.3155427713.

The spelling of 172172419 in words is "one hundred seventy-two million, one hundred seventy-two thousand, four hundred nineteen".