1349156749 has 2 divisors, whose sum is σ = 1349156750. Its totient is φ = 1349156748.

The previous prime is 1349156741. The next prime is 1349156773. The reversal of 1349156749 is 9476519431.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 945870025 + 403286724 = 30755^2 + 20082^2 .

It is a cyclic number.

It is not a de Polignac number, because 1349156749 - 2³ = 1349156741 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1349156741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 674578374 + 674578375.

It is an arithmetic number, because the mean of its divisors is an integer number (674578375).

Almost surely, 2^1349156749 is an apocalyptic number.

It is an amenable number.

1349156749 is a deficient number, since it is larger than the sum of its proper divisors (1).

1349156749 is an equidigital number, since it uses as much as digits as its factorization.

1349156749 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 816480, while the sum is 49.

The square root of 1349156749 is about 36730.8691566099. The cubic root of 1349156749 is about 1104.9792858671.

The spelling of 1349156749 in words is "one billion, three hundred forty-nine million, one hundred fifty-six thousand, seven hundred forty-nine".