1249701913 has 2 divisors, whose sum is σ = 1249701914. Its totient is φ = 1249701912.

The previous prime is 1249701911. The next prime is 1249701923. The reversal of 1249701913 is 3191079421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 822370329 + 427331584 = 28677^2 + 20672^2 .

It is a cyclic number.

It is not a de Polignac number, because 1249701913 - 2¹ = 1249701911 is a prime.

Together with 1249701911, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (1249701911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624850956 + 624850957.

It is an arithmetic number, because the mean of its divisors is an integer number (624850957).

Almost surely, 2^1249701913 is an apocalyptic number.

It is an amenable number.

1249701913 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249701913 is an equidigital number, since it uses as much as digits as its factorization.

1249701913 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 13608, while the sum is 37.

The square root of 1249701913 is about 35351.1232211934. The cubic root of 1249701913 is about 1077.1317103454.

The spelling of 1249701913 in words is "one billion, two hundred forty-nine million, seven hundred one thousand, nine hundred thirteen".