1349981249 has 2 divisors, whose sum is σ = 1349981250. Its totient is φ = 1349981248.

The previous prime is 1349981221. The next prime is 1349981257. The reversal of 1349981249 is 9421899431.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1274847025 + 75134224 = 35705^2 + 8668^2 .

It is a cyclic number.

It is not a de Polignac number, because 1349981249 - 2²⁸ = 1081545793 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1349981197 and 1349981206.

It is not a weakly prime, because it can be changed into another prime (1349981449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 674990624 + 674990625.

It is an arithmetic number, because the mean of its divisors is an integer number (674990625).

Almost surely, 2^1349981249 is an apocalyptic number.

It is an amenable number.

1349981249 is a deficient number, since it is larger than the sum of its proper divisors (1).

1349981249 is an equidigital number, since it uses as much as digits as its factorization.

1349981249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 559872, while the sum is 50.

The square root of 1349981249 is about 36742.0909720718. The cubic root of 1349981249 is about 1105.2043325851.

The spelling of 1349981249 in words is "one billion, three hundred forty-nine million, nine hundred eighty-one thousand, two hundred forty-nine".