869637149 has 2 divisors, whose sum is σ = 869637150. Its totient is φ = 869637148.

The previous prime is 869637121. The next prime is 869637151. The reversal of 869637149 is 941736968.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 816244900 + 53392249 = 28570^2 + 7307^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-869637149 is a prime.

Together with 869637151, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 869637149.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869637179) 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, 434818574 + 434818575.

It is an arithmetic number, because the mean of its divisors is an integer number (434818575).

Almost surely, 2^869637149 is an apocalyptic number.

It is an amenable number.

869637149 is a deficient number, since it is larger than the sum of its proper divisors (1).

869637149 is an equidigital number, since it uses as much as digits as its factorization.

869637149 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1959552, while the sum is 53.

The square root of 869637149 is about 29489.6108655235. The cubic root of 869637149 is about 954.5075351717.

The spelling of 869637149 in words is "eight hundred sixty-nine million, six hundred thirty-seven thousand, one hundred forty-nine".