869789677 has 2 divisors, whose sum is σ = 869789678. Its totient is φ = 869789676.

The previous prime is 869789647. The next prime is 869789693. The reversal of 869789677 is 776987968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 653876041 + 215913636 = 25571^2 + 14694^2 .

It is a cyclic number.

It is not a de Polignac number, because 869789677 - 2⁷ = 869789549 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869789617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434894838 + 434894839.

It is an arithmetic number, because the mean of its divisors is an integer number (434894839).

Almost surely, 2^869789677 is an apocalyptic number.

It is an amenable number.

869789677 is a deficient number, since it is larger than the sum of its proper divisors (1).

869789677 is an equidigital number, since it uses as much as digits as its factorization.

869789677 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 64012032, while the sum is 67.

The square root of 869789677 is about 29492.1968832435. The cubic root of 869789677 is about 954.5633364580.

The spelling of 869789677 in words is "eight hundred sixty-nine million, seven hundred eighty-nine thousand, six hundred seventy-seven".