999995090 has 8 divisors (see below), whose sum is σ = 1799991180. Its totient is φ = 399998032.

The previous prime is 999994987. The next prime is 999995093. The reversal of 999995090 is 90599999.

It can be written as a sum of positive squares in 2 ways, for example, as 987027889 + 12967201 = 31417^2 + 3601^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (999995093) 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, 49999745 + ... + 49999764.

Almost surely, 2^999995090 is an apocalyptic number.

999995090 is a deficient number, since it is larger than the sum of its proper divisors (799996090).

999995090 is a wasteful number, since it uses less digits than its factorization.

999995090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99999516.

The product of its (nonzero) digits is 2657205, while the sum is 59.

The square root of 999995090 is about 31622.6989676719. The cubic root of 999995090 is about 999.9983633307.

The spelling of 999995090 in words is "nine hundred ninety-nine million, nine hundred ninety-five thousand, ninety".