999682889 has 4 divisors (see below), whose sum is σ = 1000372356. Its totient is φ = 998993424.

The previous prime is 999682883. The next prime is 999682897. The reversal of 999682889 is 988286999.

It is a happy number.

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 847974400 + 151708489 = 29120^2 + 12317^2 .

It is a cyclic number.

It is not a de Polignac number, because 999682889 - 2⁸ = 999682633 is a prime.

It is a super-3 number, since 3×999682889³ (a number of 28 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999682883) 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, 342554 + ... + 345459.

It is an arithmetic number, because the mean of its divisors is an integer number (250093089).

Almost surely, 2^999682889 is an apocalyptic number.

It is an amenable number.

999682889 is a deficient number, since it is larger than the sum of its proper divisors (689467).

999682889 is a wasteful number, since it uses less digits than its factorization.

999682889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 689466.

The product of its digits is 40310784, while the sum is 68.

The square root of 999682889 is about 31617.7622389694. The cubic root of 999682889 is about 999.8942851581.

The spelling of 999682889 in words is "nine hundred ninety-nine million, six hundred eighty-two thousand, eight hundred eighty-nine".