718427 has 2 divisors, whose sum is σ = 718428. Its totient is φ = 718426.

The previous prime is 718423. The next prime is 718433. The reversal of 718427 is 724817.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 718427 - 2² = 718423 is a prime.

It is a super-2 number, since 2×718427² = 1032274708658, which contains 22 as substring.

It is a Chen prime.

It is an Ulam number.

It is a self number, because there is not a number n which added to its sum of digits gives 718427.

It is not a weakly prime, because it can be changed into another prime (718423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359213 + 359214.

It is an arithmetic number, because the mean of its divisors is an integer number (359214).

2⁷¹⁸⁴²⁷ is an apocalyptic number.

718427 is a deficient number, since it is larger than the sum of its proper divisors (1).

718427 is an equidigital number, since it uses as much as digits as its factorization.

718427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3136, while the sum is 29.

The square root of 718427 is about 847.6007314768. The cubic root of 718427 is about 89.5627765102.

The spelling of 718427 in words is "seven hundred eighteen thousand, four hundred twenty-seven".