1297547617 has 2 divisors, whose sum is σ = 1297547618. Its totient is φ = 1297547616.

The previous prime is 1297547611. The next prime is 1297547621. The reversal of 1297547617 is 7167457921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 760049761 + 537497856 = 27569^2 + 23184^2 .

It is a cyclic number.

It is not a de Polignac number, because 1297547617 - 2²³ = 1289159009 is a prime.

It is not a weakly prime, because it can be changed into another prime (1297547611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648773808 + 648773809.

It is an arithmetic number, because the mean of its divisors is an integer number (648773809).

Almost surely, 2^1297547617 is an apocalyptic number.

It is an amenable number.

1297547617 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297547617 is an equidigital number, since it uses as much as digits as its factorization.

1297547617 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 740880, while the sum is 49.

The square root of 1297547617 is about 36021.4882674217. The cubic root of 1297547617 is about 1090.7061655858.

The spelling of 1297547617 in words is "one billion, two hundred ninety-seven million, five hundred forty-seven thousand, six hundred seventeen".