542172617 has 4 divisors (see below), whose sum is σ = 619625856. Its totient is φ = 464719380.

The previous prime is 542172613. The next prime is 542172623. The reversal of 542172617 is 716271245.

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, and also an emirpimes, since its reverse is a distinct semiprime: 716271245 = 5 ⋅143254249.

It is a cyclic number.

It is not a de Polignac number, because 542172617 - 2² = 542172613 is a prime.

It is a super-2 number, since 2×542172617² = 587902293249257378, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (542172611) 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, 38726609 + ... + 38726622.

It is an arithmetic number, because the mean of its divisors is an integer number (154906464).

Almost surely, 2^542172617 is an apocalyptic number.

It is an amenable number.

542172617 is a deficient number, since it is larger than the sum of its proper divisors (77453239).

542172617 is an equidigital number, since it uses as much as digits as its factorization.

542172617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77453238.

The product of its digits is 23520, while the sum is 35.

The square root of 542172617 is about 23284.6004260327. The cubic root of 542172617 is about 815.4159328254.

The spelling of 542172617 in words is "five hundred forty-two million, one hundred seventy-two thousand, six hundred seventeen".