998601907 has 2 divisors, whose sum is σ = 998601908. Its totient is φ = 998601906.

The previous prime is 998601881. The next prime is 998601931. The reversal of 998601907 is 709106899.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 998601907 - 2¹¹ = 998599859 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (998601937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 499300953 + 499300954.

It is an arithmetic number, because the mean of its divisors is an integer number (499300954).

Almost surely, 2^998601907 is an apocalyptic number.

998601907 is a deficient number, since it is larger than the sum of its proper divisors (1).

998601907 is an equidigital number, since it uses as much as digits as its factorization.

998601907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 998601907 is about 31600.6630784862. The cubic root of 998601907 is about 999.5337516463.

The spelling of 998601907 in words is "nine hundred ninety-eight million, six hundred one thousand, nine hundred seven".