989853677 has 2 divisors, whose sum is σ = 989853678. Its totient is φ = 989853676.

The previous prime is 989853673. The next prime is 989853701. The reversal of 989853677 is 776358989.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 791071876 + 198781801 = 28126^2 + 14099^2 .

It is a cyclic number.

It is not a de Polignac number, because 989853677 - 2² = 989853673 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (989853673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 494926838 + 494926839.

It is an arithmetic number, because the mean of its divisors is an integer number (494926839).

Almost surely, 2^989853677 is an apocalyptic number.

It is an amenable number.

989853677 is a deficient number, since it is larger than the sum of its proper divisors (1).

989853677 is an equidigital number, since it uses as much as digits as its factorization.

989853677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 22861440, while the sum is 62.

The square root of 989853677 is about 31461.9401340731. The cubic root of 989853677 is about 996.6063887637.

The spelling of 989853677 in words is "nine hundred eighty-nine million, eight hundred fifty-three thousand, six hundred seventy-seven".