869611973 has 2 divisors, whose sum is σ = 869611974. Its totient is φ = 869611972.

The previous prime is 869611949. The next prime is 869611979. The reversal of 869611973 is 379116968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 499164964 + 370447009 = 22342^2 + 19247^2 .

It is a cyclic number.

It is not a de Polignac number, because 869611973 - 2¹⁰ = 869610949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869611979) 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, 434805986 + 434805987.

It is an arithmetic number, because the mean of its divisors is an integer number (434805987).

Almost surely, 2^869611973 is an apocalyptic number.

It is an amenable number.

869611973 is a deficient number, since it is larger than the sum of its proper divisors (1).

869611973 is an equidigital number, since it uses as much as digits as its factorization.

869611973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 50.

The square root of 869611973 is about 29489.1840002398. The cubic root of 869611973 is about 954.4983240835.

The spelling of 869611973 in words is "eight hundred sixty-nine million, six hundred eleven thousand, nine hundred seventy-three".