1687907297 has 2 divisors, whose sum is σ = 1687907298. Its totient is φ = 1687907296.

The previous prime is 1687907281. The next prime is 1687907369. The reversal of 1687907297 is 7927097861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1591690816 + 96216481 = 39896^2 + 9809^2 .

It is a cyclic number.

It is not a de Polignac number, because 1687907297 - 2⁴ = 1687907281 is a prime.

It is not a weakly prime, because it can be changed into another prime (1687907497) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 843953648 + 843953649.

It is an arithmetic number, because the mean of its divisors is an integer number (843953649).

Almost surely, 2^1687907297 is an apocalyptic number.

It is an amenable number.

1687907297 is a deficient number, since it is larger than the sum of its proper divisors (1).

1687907297 is an equidigital number, since it uses as much as digits as its factorization.

1687907297 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2667168, while the sum is 56.

The square root of 1687907297 is about 41084.1489750001. The cubic root of 1687907297 is about 1190.6465655208.

The spelling of 1687907297 in words is "one billion, six hundred eighty-seven million, nine hundred seven thousand, two hundred ninety-seven".