1318471897 has 2 divisors, whose sum is σ = 1318471898. Its totient is φ = 1318471896.

The previous prime is 1318471867. The next prime is 1318471919. The reversal of 1318471897 is 7981748131.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 982446336 + 336025561 = 31344^2 + 18331^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1318471897 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1318471897.

It is not a weakly prime, because it can be changed into another prime (1318471837) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 659235948 + 659235949.

It is an arithmetic number, because the mean of its divisors is an integer number (659235949).

Almost surely, 2^1318471897 is an apocalyptic number.

It is an amenable number.

1318471897 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318471897 is an equidigital number, since it uses as much as digits as its factorization.

1318471897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 338688, while the sum is 49.

The square root of 1318471897 is about 36310.7683339254. The cubic root of 1318471897 is about 1096.5378465642.

The spelling of 1318471897 in words is "one billion, three hundred eighteen million, four hundred seventy-one thousand, eight hundred ninety-seven".