869424239 has 2 divisors, whose sum is σ = 869424240. Its totient is φ = 869424238.

The previous prime is 869424197. The next prime is 869424247. The reversal of 869424239 is 932424968.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-869424239 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 869424193 and 869424202.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (869424299) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 434712119 + 434712120.

It is an arithmetic number, because the mean of its divisors is an integer number (434712120).

Almost surely, 2^869424239 is an apocalyptic number.

869424239 is a deficient number, since it is larger than the sum of its proper divisors (1).

869424239 is an equidigital number, since it uses as much as digits as its factorization.

869424239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 746496, while the sum is 47.

The square root of 869424239 is about 29486.0007291596. Note that the first 3 decimals coincide. The cubic root of 869424239 is about 954.4296326478.

The spelling of 869424239 in words is "eight hundred sixty-nine million, four hundred twenty-four thousand, two hundred thirty-nine".