999229633 has 2 divisors, whose sum is σ = 999229634. Its totient is φ = 999229632.

The previous prime is 999229529. The next prime is 999229643. The reversal of 999229633 is 336922999.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 560410929 + 438818704 = 23673^2 + 20948^2 .

It is a cyclic number.

It is not a de Polignac number, because 999229633 - 2²¹ = 997132481 is a prime.

It is not a weakly prime, because it can be changed into another prime (999229643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499614816 + 499614817.

It is an arithmetic number, because the mean of its divisors is an integer number (499614817).

Almost surely, 2^999229633 is an apocalyptic number.

It is an amenable number.

999229633 is a deficient number, since it is larger than the sum of its proper divisors (1).

999229633 is an equidigital number, since it uses as much as digits as its factorization.

999229633 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1417176, while the sum is 52.

The square root of 999229633 is about 31610.5936831310. The cubic root of 999229633 is about 999.7431450312.

The spelling of 999229633 in words is "nine hundred ninety-nine million, two hundred twenty-nine thousand, six hundred thirty-three".