990433573907 has 2 divisors, whose sum is σ = 990433573908. Its totient is φ = 990433573906.

The previous prime is 990433573867. The next prime is 990433573931. The reversal of 990433573907 is 709375334099.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 990433573907 - 2⁸ = 990433573651 is a prime.

It is not a weakly prime, because it can be changed into another prime (990433573967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 495216786953 + 495216786954.

It is an arithmetic number, because the mean of its divisors is an integer number (495216786954).

Almost surely, 2^990433573907 is an apocalyptic number.

990433573907 is a deficient number, since it is larger than the sum of its proper divisors (1).

990433573907 is an equidigital number, since it uses as much as digits as its factorization.

990433573907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 19289340, while the sum is 59.

The spelling of 990433573907 in words is "nine hundred ninety billion, four hundred thirty-three million, five hundred seventy-three thousand, nine hundred seven".