918115789 has 2 divisors, whose sum is σ = 918115790. Its totient is φ = 918115788.

The previous prime is 918115741. The next prime is 918115811. The reversal of 918115789 is 987511819.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 721835689 + 196280100 = 26867^2 + 14010^2 .

It is a cyclic number.

It is not a de Polignac number, because 918115789 - 2¹⁹ = 917591501 is a prime.

It is a super-2 number, since 2×918115789² = 1685873204022185042, 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 (918115729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 459057894 + 459057895.

It is an arithmetic number, because the mean of its divisors is an integer number (459057895).

Almost surely, 2^918115789 is an apocalyptic number.

It is an amenable number.

918115789 is a deficient number, since it is larger than the sum of its proper divisors (1).

918115789 is an equidigital number, since it uses as much as digits as its factorization.

918115789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 181440, while the sum is 49.

The square root of 918115789 is about 30300.4255580677. The cubic root of 918115789 is about 971.9244004748.

The spelling of 918115789 in words is "nine hundred eighteen million, one hundred fifteen thousand, seven hundred eighty-nine".