1236247297949 has 2 divisors, whose sum is σ = 1236247297950. Its totient is φ = 1236247297948.

The previous prime is 1236247297897. The next prime is 1236247297951. The reversal of 1236247297949 is 9497927426321.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 879127513924 + 357119784025 = 937618^2 + 597595^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1236247297949 is a prime.

Together with 1236247297951, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1236247297969) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 618123648974 + 618123648975.

It is an arithmetic number, because the mean of its divisors is an integer number (618123648975).

Almost surely, 2^{1236247297949} is an apocalyptic number.

It is an amenable number.

1236247297949 is a deficient number, since it is larger than the sum of its proper divisors (1).

1236247297949 is an equidigital number, since it uses as much as digits as its factorization.

1236247297949 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 82301184, while the sum is 65.

The spelling of 1236247297949 in words is "one trillion, two hundred thirty-six billion, two hundred forty-seven million, two hundred ninety-seven thousand, nine hundred forty-nine".