2606243987 has 2 divisors, whose sum is σ = 2606243988. Its totient is φ = 2606243986.

The previous prime is 2606243963. The next prime is 2606243989. The reversal of 2606243987 is 7893426062.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2606243987 - 2⁶ = 2606243923 is a prime.

Together with 2606243989, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2606243989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1303121993 + 1303121994.

It is an arithmetic number, because the mean of its divisors is an integer number (1303121994).

Almost surely, 2^2606243987 is an apocalyptic number.

2606243987 is a deficient number, since it is larger than the sum of its proper divisors (1).

2606243987 is an equidigital number, since it uses as much as digits as its factorization.

2606243987 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 870912, while the sum is 47.

The square root of 2606243987 is about 51051.3857500460. The cubic root of 2606243987 is about 1376.1687450443.

The spelling of 2606243987 in words is "two billion, six hundred six million, two hundred forty-three thousand, nine hundred eighty-seven".