1249116613 has 2 divisors, whose sum is σ = 1249116614. Its totient is φ = 1249116612.

The previous prime is 1249116611. The next prime is 1249116647. The reversal of 1249116613 is 3166119421.

It is an a-pointer prime, because the next prime (1249116647) can be obtained adding 1249116613 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 670136769 + 578979844 = 25887^2 + 24062^2 .

It is a cyclic number.

It is not a de Polignac number, because 1249116613 - 2¹ = 1249116611 is a prime.

Together with 1249116611, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1249116611) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624558306 + 624558307.

It is an arithmetic number, because the mean of its divisors is an integer number (624558307).

Almost surely, 2^1249116613 is an apocalyptic number.

It is an amenable number.

1249116613 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249116613 is an equidigital number, since it uses as much as digits as its factorization.

1249116613 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7776, while the sum is 34.

The square root of 1249116613 is about 35342.8438725579. The cubic root of 1249116613 is about 1076.9635252679.

The spelling of 1249116613 in words is "one billion, two hundred forty-nine million, one hundred sixteen thousand, six hundred thirteen".