999814897 has 4 divisors (see below), whose sum is σ = 1058627556. Its totient is φ = 941002240.

The previous prime is 999814891. The next prime is 999814909. The reversal of 999814897 is 798418999.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 311487201 + 688327696 = 17649^2 + 26236^2 .

It is a cyclic number.

It is not a de Polignac number, because 999814897 - 2¹⁵ = 999782129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999814891) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 29406304 + ... + 29406337.

It is an arithmetic number, because the mean of its divisors is an integer number (264656889).

Almost surely, 2^999814897 is an apocalyptic number.

It is an amenable number.

999814897 is a deficient number, since it is larger than the sum of its proper divisors (58812659).

999814897 is a wasteful number, since it uses less digits than its factorization.

999814897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58812658.

The product of its digits is 11757312, while the sum is 64.

The square root of 999814897 is about 31619.8497308257. The cubic root of 999814897 is about 999.9382951926.

The spelling of 999814897 in words is "nine hundred ninety-nine million, eight hundred fourteen thousand, eight hundred ninety-seven".