1297969537 has 2 divisors, whose sum is σ = 1297969538. Its totient is φ = 1297969536.

The previous prime is 1297969507. The next prime is 1297969549. The reversal of 1297969537 is 7359697921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 885717121 + 412252416 = 29761^2 + 20304^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1297969537 is a prime.

It is not a weakly prime, because it can be changed into another prime (1297969507) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648984768 + 648984769.

It is an arithmetic number, because the mean of its divisors is an integer number (648984769).

Almost surely, 2^1297969537 is an apocalyptic number.

It is an amenable number.

1297969537 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297969537 is an equidigital number, since it uses as much as digits as its factorization.

1297969537 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6429780, while the sum is 58.

The square root of 1297969537 is about 36027.3442956874. The cubic root of 1297969537 is about 1090.8243734185.

The spelling of 1297969537 in words is "one billion, two hundred ninety-seven million, nine hundred sixty-nine thousand, five hundred thirty-seven".