4917871861 has 4 divisors (see below), whose sum is σ = 5620424992. Its totient is φ = 4215318732.

The previous prime is 4917871841. The next prime is 4917871943. The reversal of 4917871861 is 1681787194.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 4917871861 - 2⁷ = 4917871733 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 4917871799 and 4917871808.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4917871801) 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, 351276555 + ... + 351276568.

It is an arithmetic number, because the mean of its divisors is an integer number (1405106248).

Almost surely, 2^4917871861 is an apocalyptic number.

It is an amenable number.

4917871861 is a deficient number, since it is larger than the sum of its proper divisors (702553131).

4917871861 is an equidigital number, since it uses as much as digits as its factorization.

4917871861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 702553130.

The product of its digits is 677376, while the sum is 52.

The square root of 4917871861 is about 70127.5399611308. The cubic root of 4917871861 is about 1700.5617360474.

The spelling of 4917871861 in words is "four billion, nine hundred seventeen million, eight hundred seventy-one thousand, eight hundred sixty-one".