1297698511 has 2 divisors, whose sum is σ = 1297698512. Its totient is φ = 1297698510.

The previous prime is 1297698509. The next prime is 1297698551. The reversal of 1297698511 is 1158967921.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1297698511 - 2¹ = 1297698509 is a prime.

Together with 1297698509, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1297698551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648849255 + 648849256.

It is an arithmetic number, because the mean of its divisors is an integer number (648849256).

Almost surely, 2^1297698511 is an apocalyptic number.

1297698511 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297698511 is an equidigital number, since it uses as much as digits as its factorization.

1297698511 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 49.

The square root of 1297698511 is about 36023.5827063328. The cubic root of 1297698511 is about 1090.7484439666.

The spelling of 1297698511 in words is "one billion, two hundred ninety-seven million, six hundred ninety-eight thousand, five hundred eleven".