1297337887 has 2 divisors, whose sum is σ = 1297337888. Its totient is φ = 1297337886.

The previous prime is 1297337861. The next prime is 1297337929. The reversal of 1297337887 is 7887337921.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1297337887 - 2⁷ = 1297337759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1297337807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 648668943 + 648668944.

It is an arithmetic number, because the mean of its divisors is an integer number (648668944).

Almost surely, 2^1297337887 is an apocalyptic number.

1297337887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1297337887 is an equidigital number, since it uses as much as digits as its factorization.

1297337887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3556224, while the sum is 55.

The square root of 1297337887 is about 36018.5769707800. The cubic root of 1297337887 is about 1090.6473967393.

The spelling of 1297337887 in words is "one billion, two hundred ninety-seven million, three hundred thirty-seven thousand, eight hundred eighty-seven".