1249631413 has 2 divisors, whose sum is σ = 1249631414. Its totient is φ = 1249631412.

The previous prime is 1249631407. The next prime is 1249631417. The reversal of 1249631413 is 3141369421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 895326084 + 354305329 = 29922^2 + 18823^2 .

It is a cyclic number.

It is not a de Polignac number, because 1249631413 - 2⁵ = 1249631381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1249631417) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 624815706 + 624815707.

It is an arithmetic number, because the mean of its divisors is an integer number (624815707).

Almost surely, 2^1249631413 is an apocalyptic number.

It is an amenable number.

1249631413 is a deficient number, since it is larger than the sum of its proper divisors (1).

1249631413 is an equidigital number, since it uses as much as digits as its factorization.

1249631413 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 34.

The square root of 1249631413 is about 35350.1260676677. The cubic root of 1249631413 is about 1077.1114550581. Note that the first 3 decimals are identical.

The spelling of 1249631413 in words is "one billion, two hundred forty-nine million, six hundred thirty-one thousand, four hundred thirteen".