617142239 has 4 divisors (see below), whose sum is σ = 705305424. Its totient is φ = 528979056.

The previous prime is 617142217. The next prime is 617142241. The reversal of 617142239 is 932241716.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 617142239 - 2²⁸ = 348706783 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 617142199 and 617142208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (617142139) 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, 44081582 + ... + 44081595.

It is an arithmetic number, because the mean of its divisors is an integer number (176326356).

Almost surely, 2^617142239 is an apocalyptic number.

617142239 is a deficient number, since it is larger than the sum of its proper divisors (88163185).

617142239 is an equidigital number, since it uses as much as digits as its factorization.

617142239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88163184.

The product of its digits is 18144, while the sum is 35.

The square root of 617142239 is about 24842.3476950147. The cubic root of 617142239 is about 851.3897629256.

The spelling of 617142239 in words is "six hundred seventeen million, one hundred forty-two thousand, two hundred thirty-nine".