989969767 has 2 divisors, whose sum is σ = 989969768. Its totient is φ = 989969766.

The previous prime is 989969753. The next prime is 989969803. The reversal of 989969767 is 767969989.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-989969767 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 989969696 and 989969705.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989969567) 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, 494984883 + 494984884.

It is an arithmetic number, because the mean of its divisors is an integer number (494984884).

Almost surely, 2^989969767 is an apocalyptic number.

989969767 is a deficient number, since it is larger than the sum of its proper divisors (1).

989969767 is an equidigital number, since it uses as much as digits as its factorization.

989969767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 92588832, while the sum is 70.

The square root of 989969767 is about 31463.7850075289. The cubic root of 989969767 is about 996.6453478933.

The spelling of 989969767 in words is "nine hundred eighty-nine million, nine hundred sixty-nine thousand, seven hundred sixty-seven".