990251299 has 2 divisors, whose sum is σ = 990251300. Its totient is φ = 990251298.

The previous prime is 990251287. The next prime is 990251303. The reversal of 990251299 is 992152099.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 990251299 - 2⁵ = 990251267 is a prime.

It is not a weakly prime, because it can be changed into another prime (990251279) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495125649 + 495125650.

It is an arithmetic number, because the mean of its divisors is an integer number (495125650).

Almost surely, 2^990251299 is an apocalyptic number.

990251299 is a deficient number, since it is larger than the sum of its proper divisors (1).

990251299 is an equidigital number, since it uses as much as digits as its factorization.

990251299 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 131220, while the sum is 46.

The square root of 990251299 is about 31468.2585949715. The cubic root of 990251299 is about 996.7398157493.

The spelling of 990251299 in words is "nine hundred ninety million, two hundred fifty-one thousand, two hundred ninety-nine".