718427869 has 2 divisors, whose sum is σ = 718427870. Its totient is φ = 718427868.

The previous prime is 718427861. The next prime is 718427909. The reversal of 718427869 is 968724817.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 708251769 + 10176100 = 26613^2 + 3190^2 .

It is a cyclic number.

It is not a de Polignac number, because 718427869 - 2³ = 718427861 is a prime.

It is a super-2 number, since 2×718427869² = 1032277205911762322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (718427861) 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, 359213934 + 359213935.

It is an arithmetic number, because the mean of its divisors is an integer number (359213935).

Almost surely, 2^718427869 is an apocalyptic number.

It is an amenable number.

718427869 is a deficient number, since it is larger than the sum of its proper divisors (1).

718427869 is an equidigital number, since it uses as much as digits as its factorization.

718427869 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1354752, while the sum is 52.

The square root of 718427869 is about 26803.5047894860. The cubic root of 718427869 is about 895.6281262156.

It can be divided in two parts, 7184 and 27869, that added together give a palindrome (35053).

The spelling of 718427869 in words is "seven hundred eighteen million, four hundred twenty-seven thousand, eight hundred sixty-nine".