868551239 has 2 divisors, whose sum is σ = 868551240. Its totient is φ = 868551238.

The previous prime is 868551197. The next prime is 868551241. The reversal of 868551239 is 932155868.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 868551239 - 2²⁴ = 851774023 is a prime.

Together with 868551241, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 868551193 and 868551202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (868551269) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434275619 + 434275620.

It is an arithmetic number, because the mean of its divisors is an integer number (434275620).

Almost surely, 2^868551239 is an apocalyptic number.

868551239 is a deficient number, since it is larger than the sum of its proper divisors (1).

868551239 is an equidigital number, since it uses as much as digits as its factorization.

868551239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 518400, while the sum is 47.

The square root of 868551239 is about 29471.1933759052. The cubic root of 868551239 is about 954.1100739986.

The spelling of 868551239 in words is "eight hundred sixty-eight million, five hundred fifty-one thousand, two hundred thirty-nine".