990433211 has 2 divisors, whose sum is σ = 990433212. Its totient is φ = 990433210.

The previous prime is 990433193. The next prime is 990433231. The reversal of 990433211 is 112334099.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990433211 is a prime.

It is not a weakly prime, because it can be changed into another prime (990433231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495216605 + 495216606.

It is an arithmetic number, because the mean of its divisors is an integer number (495216606).

Almost surely, 2^990433211 is an apocalyptic number.

990433211 is a deficient number, since it is larger than the sum of its proper divisors (1).

990433211 is an equidigital number, since it uses as much as digits as its factorization.

990433211 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5832, while the sum is 32.

The square root of 990433211 is about 31471.1488668590. The cubic root of 990433211 is about 996.8008466653.

The spelling of 990433211 in words is "nine hundred ninety million, four hundred thirty-three thousand, two hundred eleven".