4891123005 has 16 divisors (see below), whose sum is σ = 7933001280. Its totient is φ = 2572864128.

The previous prime is 4891122979. The next prime is 4891123007. The reversal of 4891123005 is 5003211984.

It is not a de Polignac number, because 4891123005 - 2⁶ = 4891122941 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4891123007) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2232295 + ... + 2234484.

It is an arithmetic number, because the mean of its divisors is an integer number (495812580).

Almost surely, 2^4891123005 is an apocalyptic number.

It is an amenable number.

4891123005 is a deficient number, since it is larger than the sum of its proper divisors (3041878275).

4891123005 is a wasteful number, since it uses less digits than its factorization.

4891123005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4466860.

The product of its (nonzero) digits is 8640, while the sum is 33.

The square root of 4891123005 is about 69936.5641492346. The cubic root of 4891123005 is about 1697.4729472387.

Adding to 4891123005 its reverse (5003211984), we get a palindrome (9894334989).

The spelling of 4891123005 in words is "four billion, eight hundred ninety-one million, one hundred twenty-three thousand, five".