1297698551 has 2 divisors, whose sum is σ = 1297698552. Its totient is φ = 1297698550.

The previous prime is 1297698511. The next prime is 1297698557. The reversal of 1297698551 is 1558967921.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1297698551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1297698493 and 1297698502.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1297698557) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648849275 + 648849276.

It is an arithmetic number, because the mean of its divisors is an integer number (648849276).

Almost surely, 2^1297698551 is an apocalyptic number.

1297698551 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297698551 is an equidigital number, since it uses as much as digits as its factorization.

1297698551 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1360800, while the sum is 53.

The square root of 1297698551 is about 36023.5832615247. The cubic root of 1297698551 is about 1090.7484551736.

The spelling of 1297698551 in words is "one billion, two hundred ninety-seven million, six hundred ninety-eight thousand, five hundred fifty-one".