2491987827 has 16 divisors (see below), whose sum is σ = 3798047232. Its totient is φ = 1423718400.

The previous prime is 2491987819. The next prime is 2491987843. The reversal of 2491987827 is 7287891942.

2491987827 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2491987827 - 2³ = 2491987819 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2491987627) 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, 159202 + ... + 174152.

It is an arithmetic number, because the mean of its divisors is an integer number (237377952).

Almost surely, 2^2491987827 is an apocalyptic number.

2491987827 is a deficient number, since it is larger than the sum of its proper divisors (1306059405).

2491987827 is a wasteful number, since it uses less digits than its factorization.

2491987827 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22898.

The product of its digits is 4064256, while the sum is 57.

The square root of 2491987827 is about 49919.8139720092. The cubic root of 2491987827 is about 1355.7573643929.

The spelling of 2491987827 in words is "two billion, four hundred ninety-one million, nine hundred eighty-seven thousand, eight hundred twenty-seven".