1298315723 has 2 divisors, whose sum is σ = 1298315724. Its totient is φ = 1298315722.

The previous prime is 1298315699. The next prime is 1298315833. The reversal of 1298315723 is 3275138921.

It is a weak prime.

It is an emirp because it is prime and its reverse (3275138921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1298315723 - 2¹² = 1298311627 is a prime.

It is not a weakly prime, because it can be changed into another prime (1298345723) 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, 649157861 + 649157862.

It is an arithmetic number, because the mean of its divisors is an integer number (649157862).

Almost surely, 2^1298315723 is an apocalyptic number.

1298315723 is a deficient number, since it is larger than the sum of its proper divisors (1).

1298315723 is an equidigital number, since it uses as much as digits as its factorization.

1298315723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 1298315723 is about 36032.1484649472. The cubic root of 1298315723 is about 1090.9213439939.

The spelling of 1298315723 in words is "one billion, two hundred ninety-eight million, three hundred fifteen thousand, seven hundred twenty-three".