1318725871 has 2 divisors, whose sum is σ = 1318725872. Its totient is φ = 1318725870.

The previous prime is 1318725857. The next prime is 1318725899. The reversal of 1318725871 is 1785278131.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1318725871 - 2⁷ = 1318725743 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1318725971) 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, 659362935 + 659362936.

It is an arithmetic number, because the mean of its divisors is an integer number (659362936).

Almost surely, 2^1318725871 is an apocalyptic number.

1318725871 is a deficient number, since it is larger than the sum of its proper divisors (1).

1318725871 is an equidigital number, since it uses as much as digits as its factorization.

1318725871 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 94080, while the sum is 43.

The square root of 1318725871 is about 36314.2653925424. The cubic root of 1318725871 is about 1096.6082498403.

The spelling of 1318725871 in words is "one billion, three hundred eighteen million, seven hundred twenty-five thousand, eight hundred seventy-one".