999318545 has 4 divisors (see below), whose sum is σ = 1199182260. Its totient is φ = 799454832.

The previous prime is 999318521. The next prime is 999318553. The reversal of 999318545 is 545813999.

It is a happy number.

It is a Cunningham number, because it is equal to 31612²+1.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 545813999 = 101 ⋅5404099.

It can be written as a sum of positive squares in 2 ways, for example, as 359785024 + 639533521 = 18968^2 + 25289^2 .

It is a cyclic number.

It is not a de Polignac number, because 999318545 - 2²⁰ = 998269969 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99931850 + ... + 99931859.

It is an arithmetic number, because the mean of its divisors is an integer number (299795565).

Almost surely, 2^999318545 is an apocalyptic number.

It is an amenable number.

999318545 is a deficient number, since it is larger than the sum of its proper divisors (199863715).

999318545 is a wasteful number, since it uses less digits than its factorization.

999318545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199863714.

The product of its digits is 1749600, while the sum is 53.

The square root of 999318545 is about 31612.0000158168. Note that the first 4 decimals coincide. The cubic root of 999318545 is about 999.7727967159.

The spelling of 999318545 in words is "nine hundred ninety-nine million, three hundred eighteen thousand, five hundred forty-five".