2499565823 has 2 divisors, whose sum is σ = 2499565824. Its totient is φ = 2499565822.

The previous prime is 2499565813. The next prime is 2499565841. The reversal of 2499565823 is 3285659942.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2499565823 - 2⁶ = 2499565759 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2499565813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1249782911 + 1249782912.

It is an arithmetic number, because the mean of its divisors is an integer number (1249782912).

Almost surely, 2^2499565823 is an apocalyptic number.

2499565823 is a deficient number, since it is larger than the sum of its proper divisors (1).

2499565823 is an equidigital number, since it uses as much as digits as its factorization.

2499565823 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4665600, while the sum is 53.

The square root of 2499565823 is about 49995.6580414740. The cubic root of 2499565823 is about 1357.1302345688.

The spelling of 2499565823 in words is "two billion, four hundred ninety-nine million, five hundred sixty-five thousand, eight hundred twenty-three".