718919 has 2 divisors, whose sum is σ = 718920. Its totient is φ = 718918.

The previous prime is 718901. The next prime is 718931. The reversal of 718919 is 919817.

It is a strong prime.

It is an emirp because it is prime and its reverse (919817) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-718919 is a prime.

It is a super-2 number, since 2×718919² = 1033689057122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (718999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 359459 + 359460.

It is an arithmetic number, because the mean of its divisors is an integer number (359460).

2⁷¹⁸⁹¹⁹ is an apocalyptic number.

718919 is a deficient number, since it is larger than the sum of its proper divisors (1).

718919 is an equidigital number, since it uses as much as digits as its factorization.

718919 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4536, while the sum is 35.

The square root of 718919 is about 847.8909127948. The cubic root of 718919 is about 89.5832169219.

The spelling of 718919 in words is "seven hundred eighteen thousand, nine hundred nineteen".