999995089 has 4 divisors (see below), whose sum is σ = 1000059300. Its totient is φ = 999930880.

The previous prime is 999994987. The next prime is 999995093. The reversal of 999995089 is 980599999.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 915667600 + 84327489 = 30260^2 + 9183^2 .

It is a cyclic number.

It is not a de Polignac number, because 999995089 - 2¹¹ = 999993041 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (999975089) 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, 7737 + ... + 45385.

It is an arithmetic number, because the mean of its divisors is an integer number (250014825).

Almost surely, 2^999995089 is an apocalyptic number.

It is an amenable number.

999995089 is a deficient number, since it is larger than the sum of its proper divisors (64211).

999995089 is a wasteful number, since it uses less digits than its factorization.

999995089 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64210.

The product of its (nonzero) digits is 21257640, while the sum is 67.

The square root of 999995089 is about 31622.6989518605. The cubic root of 999995089 is about 999.9983629973.

The spelling of 999995089 in words is "nine hundred ninety-nine million, nine hundred ninety-five thousand, eighty-nine".