868623169 has 2 divisors, whose sum is σ = 868623170. Its totient is φ = 868623168.

The previous prime is 868623127. The next prime is 868623187. The reversal of 868623169 is 961326868.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 744634944 + 123988225 = 27288^2 + 11135^2 .

It is a cyclic number.

It is not a de Polignac number, because 868623169 - 2²⁵ = 835068737 is a prime.

It is a super-2 number, since 2×868623169² = 1509012419447205122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (868623199) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434311584 + 434311585.

It is an arithmetic number, because the mean of its divisors is an integer number (434311585).

Almost surely, 2^868623169 is an apocalyptic number.

It is an amenable number.

868623169 is a deficient number, since it is larger than the sum of its proper divisors (1).

868623169 is an equidigital number, since it uses as much as digits as its factorization.

868623169 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 746496, while the sum is 49.

The square root of 868623169 is about 29472.4136948435. The cubic root of 868623169 is about 954.1364118203.

The spelling of 868623169 in words is "eight hundred sixty-eight million, six hundred twenty-three thousand, one hundred sixty-nine".