1296645653 has 2 divisors, whose sum is σ = 1296645654. Its totient is φ = 1296645652.

The previous prime is 1296645629. The next prime is 1296645659. The reversal of 1296645653 is 3565466921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1276061284 + 20584369 = 35722^2 + 4537^2 .

It is an emirp because it is prime and its reverse (3565466921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1296645653 - 2⁸ = 1296645397 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1296645598 and 1296645607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1296645659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648322826 + 648322827.

It is an arithmetic number, because the mean of its divisors is an integer number (648322827).

Almost surely, 2^1296645653 is an apocalyptic number.

It is an amenable number.

1296645653 is a deficient number, since it is larger than the sum of its proper divisors (1).

1296645653 is an equidigital number, since it uses as much as digits as its factorization.

1296645653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1166400, while the sum is 47.

The square root of 1296645653 is about 36008.9662861904. The cubic root of 1296645653 is about 1090.4533795552.

The spelling of 1296645653 in words is "one billion, two hundred ninety-six million, six hundred forty-five thousand, six hundred fifty-three".