918791001 has 12 divisors (see below), whose sum is σ = 1327989312. Its totient is φ = 612136536.

The previous prime is 918790981. The next prime is 918791009. The reversal of 918791001 is 100197819.

It is not a de Polignac number, because 918791001 - 2⁵ = 918790969 is a prime.

It is not an unprimeable number, because it can be changed into a prime (918791009) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17301 + ... + 46226.

It is an arithmetic number, because the mean of its divisors is an integer number (110665776).

Almost surely, 2^918791001 is an apocalyptic number.

It is an amenable number.

918791001 is a deficient number, since it is larger than the sum of its proper divisors (409198311).

918791001 is a wasteful number, since it uses less digits than its factorization.

918791001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65140 (or 65137 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 36.

The square root of 918791001 is about 30311.5654660065. The cubic root of 918791001 is about 972.1626036205.

The spelling of 918791001 in words is "nine hundred eighteen million, seven hundred ninety-one thousand, one".