618740791 has 2 divisors, whose sum is σ = 618740792. Its totient is φ = 618740790.

The previous prime is 618740783. The next prime is 618740797. The reversal of 618740791 is 197047816.

618740791 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 618740791 - 2³ = 618740783 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (618740797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 309370395 + 309370396.

It is an arithmetic number, because the mean of its divisors is an integer number (309370396).

Almost surely, 2^618740791 is an apocalyptic number.

618740791 is a deficient number, since it is larger than the sum of its proper divisors (1).

618740791 is an equidigital number, since it uses as much as digits as its factorization.

618740791 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 618740791 is about 24874.5008191119. The cubic root of 618740791 is about 852.1242329331.

The spelling of 618740791 in words is "six hundred eighteen million, seven hundred forty thousand, seven hundred ninety-one".