718642427 has 2 divisors, whose sum is σ = 718642428. Its totient is φ = 718642426.

The previous prime is 718642399. The next prime is 718642439. The reversal of 718642427 is 724246817.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 718642427 - 2⁶ = 718642363 is a prime.

It is equal to p_37167494 and since 718642427 and 37167494 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (718642447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359321213 + 359321214.

It is an arithmetic number, because the mean of its divisors is an integer number (359321214).

Almost surely, 2^718642427 is an apocalyptic number.

718642427 is a deficient number, since it is larger than the sum of its proper divisors (1).

718642427 is an equidigital number, since it uses as much as digits as its factorization.

718642427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 150528, while the sum is 41.

The square root of 718642427 is about 26807.5069150415. The cubic root of 718642427 is about 895.7172769204.

The spelling of 718642427 in words is "seven hundred eighteen million, six hundred forty-two thousand, four hundred twenty-seven".