1299738949 has 2 divisors, whose sum is σ = 1299738950. Its totient is φ = 1299738948.

The previous prime is 1299738931. The next prime is 1299738967. The reversal of 1299738949 is 9498379921.

It is a balanced prime because it is at equal distance from previous prime (1299738931) and next prime (1299738967).

It can be written as a sum of positive squares in only one way, i.e., 816530625 + 483208324 = 28575^2 + 21982^2 .

It is a cyclic number.

It is not a de Polignac number, because 1299738949 - 2⁹ = 1299738437 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1299738049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 649869474 + 649869475.

It is an arithmetic number, because the mean of its divisors is an integer number (649869475).

Almost surely, 2^1299738949 is an apocalyptic number.

It is an amenable number.

1299738949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1299738949 is an equidigital number, since it uses as much as digits as its factorization.

1299738949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8817984, while the sum is 61.

The square root of 1299738949 is about 36051.8924468605. The cubic root of 1299738949 is about 1091.3198245287.

The spelling of 1299738949 in words is "one billion, two hundred ninety-nine million, seven hundred thirty-eight thousand, nine hundred forty-nine".