2493891509 has 2 divisors, whose sum is σ = 2493891510. Its totient is φ = 2493891508.

The previous prime is 2493891497. The next prime is 2493891553. The reversal of 2493891509 is 9051983942.

It is a happy number.

2493891509 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1868141284 + 625750225 = 43222^2 + 25015^2 .

It is a cyclic number.

It is not a de Polignac number, because 2493891509 - 2²⁴ = 2477114293 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2493891559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1246945754 + 1246945755.

It is an arithmetic number, because the mean of its divisors is an integer number (1246945755).

Almost surely, 2^2493891509 is an apocalyptic number.

It is an amenable number.

2493891509 is a deficient number, since it is larger than the sum of its proper divisors (1).

2493891509 is an equidigital number, since it uses as much as digits as its factorization.

2493891509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 699840, while the sum is 50.

The square root of 2493891509 is about 49938.8777306819. The cubic root of 2493891509 is about 1356.1025070580.

The spelling of 2493891509 in words is "two billion, four hundred ninety-three million, eight hundred ninety-one thousand, five hundred nine".