990497447 has 2 divisors, whose sum is σ = 990497448. Its totient is φ = 990497446.

The previous prime is 990497383. The next prime is 990497449. The reversal of 990497447 is 744794099.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 990497447 - 2⁶ = 990497383 is a prime.

Together with 990497449, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (990497449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495248723 + 495248724.

It is an arithmetic number, because the mean of its divisors is an integer number (495248724).

Almost surely, 2^990497447 is an apocalyptic number.

990497447 is a deficient number, since it is larger than the sum of its proper divisors (1).

990497447 is an equidigital number, since it uses as much as digits as its factorization.

990497447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2286144, while the sum is 53.

The square root of 990497447 is about 31472.1694040942. The cubic root of 990497447 is about 996.8223958602.

The spelling of 990497447 in words is "nine hundred ninety million, four hundred ninety-seven thousand, four hundred forty-seven".