999950885 has 16 divisors (see below), whose sum is σ = 1243315440. Its totient is φ = 771133440.

The previous prime is 999950881. The next prime is 999950891. The reversal of 999950885 is 588059999.

It is a Cunningham number, because it is equal to 31622²+1.

It can be written as a sum of positive squares in 8 ways, for example, as 29441476 + 970509409 = 5426^2 + 31153^2 .

It is not a de Polignac number, because 999950885 - 2² = 999950881 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (999950881) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 90629 + ... + 101061.

It is an arithmetic number, because the mean of its divisors is an integer number (77707215).

Almost surely, 2^999950885 is an apocalyptic number.

It is an amenable number.

999950885 is a deficient number, since it is larger than the sum of its proper divisors (243364555).

999950885 is a wasteful number, since it uses less digits than its factorization.

999950885 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11128.

The product of its (nonzero) digits is 10497600, while the sum is 62.

The square root of 999950885 is about 31622.0000158118. Note that the first 4 decimals coincide. The cubic root of 999950885 is about 999.9836280653.

The spelling of 999950885 in words is "nine hundred ninety-nine million, nine hundred fifty thousand, eight hundred eighty-five".