989858939 has 2 divisors, whose sum is σ = 989858940. Its totient is φ = 989858938.

The previous prime is 989858927. The next prime is 989858951. The reversal of 989858939 is 939858989.

It is a balanced prime because it is at equal distance from previous prime (989858927) and next prime (989858951).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989858939 is a prime.

It is not a weakly prime, because it can be changed into another prime (989858959) 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, 494929469 + 494929470.

It is an arithmetic number, because the mean of its divisors is an integer number (494929470).

Almost surely, 2^989858939 is an apocalyptic number.

989858939 is a deficient number, since it is larger than the sum of its proper divisors (1).

989858939 is an equidigital number, since it uses as much as digits as its factorization.

989858939 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50388480, while the sum is 68.

The square root of 989858939 is about 31462.0237588112. The cubic root of 989858939 is about 996.6081547263.

The spelling of 989858939 in words is "nine hundred eighty-nine million, eight hundred fifty-eight thousand, nine hundred thirty-nine".