1305249293 has 2 divisors, whose sum is σ = 1305249294. Its totient is φ = 1305249292.

The previous prime is 1305249277. The next prime is 1305249329. The reversal of 1305249293 is 3929425031.

It is a happy number.

Together with next prime (1305249329) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 987090724 + 318158569 = 31418^2 + 17837^2 .

It is a cyclic number.

It is not a de Polignac number, because 1305249293 - 2⁴ = 1305249277 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1305249223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 652624646 + 652624647.

It is an arithmetic number, because the mean of its divisors is an integer number (652624647).

Almost surely, 2^1305249293 is an apocalyptic number.

It is an amenable number.

1305249293 is a deficient number, since it is larger than the sum of its proper divisors (1).

1305249293 is an equidigital number, since it uses as much as digits as its factorization.

1305249293 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 58320, while the sum is 38.

The square root of 1305249293 is about 36128.2340144104. The cubic root of 1305249293 is about 1092.8598951486.

The spelling of 1305249293 in words is "one billion, three hundred five million, two hundred forty-nine thousand, two hundred ninety-three".