918999513 has 24 divisors (see below), whose sum is σ = 1379877408. Its totient is φ = 611211744.

The previous prime is 918999509. The next prime is 918999533. The reversal of 918999513 is 315999819.

It is not a de Polignac number, because 918999513 - 2² = 918999509 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 918999513.

It is not an unprimeable number, because it can be changed into a prime (918999503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 103381 + ... + 111917.

It is an arithmetic number, because the mean of its divisors is an integer number (57494892).

Almost surely, 2^918999513 is an apocalyptic number.

It is an amenable number.

918999513 is a deficient number, since it is larger than the sum of its proper divisors (460877895).

918999513 is an equidigital number, since it uses as much as digits as its factorization.

918999513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8995 (or 8983 counting only the distinct ones).

The product of its digits is 787320, while the sum is 54.

The square root of 918999513 is about 30315.0047501233. The cubic root of 918999513 is about 972.2361394722.

The spelling of 918999513 in words is "nine hundred eighteen million, nine hundred ninety-nine thousand, five hundred thirteen".