990249929 has 2 divisors, whose sum is σ = 990249930. Its totient is φ = 990249928.

The previous prime is 990249919. The next prime is 990249937. The reversal of 990249929 is 929942099.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 609102400 + 381147529 = 24680^2 + 19523^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-990249929 is a prime.

It is not a weakly prime, because it can be changed into another prime (990249919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495124964 + 495124965.

It is an arithmetic number, because the mean of its divisors is an integer number (495124965).

Almost surely, 2^990249929 is an apocalyptic number.

It is an amenable number.

990249929 is a deficient number, since it is larger than the sum of its proper divisors (1).

990249929 is an equidigital number, since it uses as much as digits as its factorization.

990249929 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 944784, while the sum is 53.

The square root of 990249929 is about 31468.2368269975. The cubic root of 990249929 is about 996.7393560901.

The spelling of 990249929 in words is "nine hundred ninety million, two hundred forty-nine thousand, nine hundred twenty-nine".