2491008123 has 8 divisors (see below), whose sum is σ = 3465750528. Its totient is φ = 1588468904.

The previous prime is 2491008119. The next prime is 2491008151. The reversal of 2491008123 is 3218001942.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2491008123 - 2² = 2491008119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2491008173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18050715 + ... + 18050852.

It is an arithmetic number, because the mean of its divisors is an integer number (433218816).

Almost surely, 2^2491008123 is an apocalyptic number.

2491008123 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2491008123 is a deficient number, since it is larger than the sum of its proper divisors (974742405).

2491008123 is a wasteful number, since it uses less digits than its factorization.

2491008123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36101593.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 2491008123 is about 49910.0002304147. Note that the first 3 decimals coincide. The cubic root of 2491008123 is about 1355.5796729132.

The spelling of 2491008123 in words is "two billion, four hundred ninety-one million, eight thousand, one hundred twenty-three".