999220933 has 2 divisors, whose sum is σ = 999220934. Its totient is φ = 999220932.

The previous prime is 999220921. The next prime is 999220939. The reversal of 999220933 is 339022999.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 949687489 + 49533444 = 30817^2 + 7038^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-999220933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (999220939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499610466 + 499610467.

It is an arithmetic number, because the mean of its divisors is an integer number (499610467).

Almost surely, 2^999220933 is an apocalyptic number.

It is an amenable number.

999220933 is a deficient number, since it is larger than the sum of its proper divisors (1).

999220933 is an equidigital number, since it uses as much as digits as its factorization.

999220933 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 236196, while the sum is 46.

The square root of 999220933 is about 31610.4560707371. The cubic root of 999220933 is about 999.7402435324.

The spelling of 999220933 in words is "nine hundred ninety-nine million, two hundred twenty thousand, nine hundred thirty-three".