1297546687 has 2 divisors, whose sum is σ = 1297546688. Its totient is φ = 1297546686.

The previous prime is 1297546669. The next prime is 1297546693. The reversal of 1297546687 is 7866457921.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 1297546687 - 2⁷ = 1297546559 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1297526687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648773343 + 648773344.

It is an arithmetic number, because the mean of its divisors is an integer number (648773344).

Almost surely, 2^1297546687 is an apocalyptic number.

1297546687 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297546687 is an equidigital number, since it uses as much as digits as its factorization.

1297546687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5080320, while the sum is 55.

The square root of 1297546687 is about 36021.4753584580. The cubic root of 1297546687 is about 1090.7059050027.

The spelling of 1297546687 in words is "one billion, two hundred ninety-seven million, five hundred forty-six thousand, six hundred eighty-seven".