2497543687 has 2 divisors, whose sum is σ = 2497543688. Its totient is φ = 2497543686.

The previous prime is 2497543649. The next prime is 2497543693. The reversal of 2497543687 is 7863457942.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2497543687 - 2²⁷ = 2363325959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2497547687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1248771843 + 1248771844.

It is an arithmetic number, because the mean of its divisors is an integer number (1248771844).

Almost surely, 2^2497543687 is an apocalyptic number.

2497543687 is a deficient number, since it is larger than the sum of its proper divisors (1).

2497543687 is an equidigital number, since it uses as much as digits as its factorization.

2497543687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10160640, while the sum is 55.

The square root of 2497543687 is about 49975.4308335606. The cubic root of 2497543687 is about 1356.7641653561.

The spelling of 2497543687 in words is "two billion, four hundred ninety-seven million, five hundred forty-three thousand, six hundred eighty-seven".