1243416049 has 2 divisors, whose sum is σ = 1243416050. Its totient is φ = 1243416048.

The previous prime is 1243416019. The next prime is 1243416121. The reversal of 1243416049 is 9406143421.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1243056049 + 360000 = 35257^2 + 600^2 .

It is a cyclic number.

It is not a de Polignac number, because 1243416049 - 2¹⁹ = 1242891761 is a prime.

It is not a weakly prime, because it can be changed into another prime (1243416019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 621708024 + 621708025.

It is an arithmetic number, because the mean of its divisors is an integer number (621708025).

Almost surely, 2^1243416049 is an apocalyptic number.

It is an amenable number.

1243416049 is a deficient number, since it is larger than the sum of its proper divisors (1).

1243416049 is an equidigital number, since it uses as much as digits as its factorization.

1243416049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 34.

The square root of 1243416049 is about 35262.1049995601. The cubic root of 1243416049 is about 1075.3227223605.

The spelling of 1243416049 in words is "one billion, two hundred forty-three million, four hundred sixteen thousand, forty-nine".