618719 has 2 divisors, whose sum is σ = 618720. Its totient is φ = 618718.

The previous prime is 618707. The next prime is 618799. The reversal of 618719 is 917816.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 618719 - 2⁴ = 618703 is a prime.

It is a super-2 number, since 2×618719² = 765626401922, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618799) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309359 + 309360.

It is an arithmetic number, because the mean of its divisors is an integer number (309360).

2⁶¹⁸⁷¹⁹ is an apocalyptic number.

618719 is a deficient number, since it is larger than the sum of its proper divisors (1).

618719 is an equidigital number, since it uses as much as digits as its factorization.

618719 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 32.

The square root of 618719 is about 786.5869309873. The cubic root of 618719 is about 85.2114229360.

The spelling of 618719 in words is "six hundred eighteen thousand, seven hundred nineteen".