1249116647 has 2 divisors, whose sum is σ = 1249116648. Its totient is φ = 1249116646.

The previous prime is 1249116613. The next prime is 1249116679. The reversal of 1249116647 is 7466119421.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1249116647 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1249116607) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624558323 + 624558324.

It is an arithmetic number, because the mean of its divisors is an integer number (624558324).

Almost surely, 2^1249116647 is an apocalyptic number.

1249116647 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249116647 is an equidigital number, since it uses as much as digits as its factorization.

1249116647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 1249116647 is about 35342.8443535605. The cubic root of 1249116647 is about 1076.9635350393.

The spelling of 1249116647 in words is "one billion, two hundred forty-nine million, one hundred sixteen thousand, six hundred forty-seven".