1287147097 has 2 divisors, whose sum is σ = 1287147098. Its totient is φ = 1287147096.

The previous prime is 1287147041. The next prime is 1287147227. The reversal of 1287147097 is 7907417821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1107292176 + 179854921 = 33276^2 + 13411^2 .

It is an emirp because it is prime and its reverse (7907417821) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1287147097 - 2⁷ = 1287146969 is a prime.

It is not a weakly prime, because it can be changed into another prime (1287148097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 643573548 + 643573549.

It is an arithmetic number, because the mean of its divisors is an integer number (643573549).

Almost surely, 2^1287147097 is an apocalyptic number.

It is an amenable number.

1287147097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1287147097 is an equidigital number, since it uses as much as digits as its factorization.

1287147097 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 197568, while the sum is 46.

The square root of 1287147097 is about 35876.8323155766. The cubic root of 1287147097 is about 1087.7841517926.

The spelling of 1287147097 in words is "one billion, two hundred eighty-seven million, one hundred forty-seven thousand, ninety-seven".