718218643 has 2 divisors, whose sum is σ = 718218644. Its totient is φ = 718218642.

The previous prime is 718218629. The next prime is 718218647. The reversal of 718218643 is 346812817.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 718218643 - 2²⁹ = 181347731 is a prime.

It is a super-2 number, since 2×718218643² = 1031676038305522898, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 718218596 and 718218605.

It is not a weakly prime, because it can be changed into another prime (718218647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359109321 + 359109322.

It is an arithmetic number, because the mean of its divisors is an integer number (359109322).

Almost surely, 2^718218643 is an apocalyptic number.

718218643 is a deficient number, since it is larger than the sum of its proper divisors (1).

718218643 is an equidigital number, since it uses as much as digits as its factorization.

718218643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 40.

The square root of 718218643 is about 26799.6015455454. The cubic root of 718218643 is about 895.5411739075.

The spelling of 718218643 in words is "seven hundred eighteen million, two hundred eighteen thousand, six hundred forty-three".