85943239 has 2 divisors, whose sum is σ = 85943240. Its totient is φ = 85943238.

The previous prime is 85943237. The next prime is 85943243. The reversal of 85943239 is 93234958.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85943239 - 2¹ = 85943237 is a prime.

It is a super-2 number, since 2×85943239² = 14772480659622242, which contains 22 as substring.

Together with 85943237, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 85943195 and 85943204.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85943237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42971619 + 42971620.

It is an arithmetic number, because the mean of its divisors is an integer number (42971620).

Almost surely, 2^85943239 is an apocalyptic number.

85943239 is a deficient number, since it is larger than the sum of its proper divisors (1).

85943239 is an equidigital number, since it uses as much as digits as its factorization.

85943239 is an evil number, because the sum of its binary digits is even.

The product of its digits is 233280, while the sum is 43.

The square root of 85943239 is about 9270.5576423428. The cubic root of 85943239 is about 441.3033650518.

The spelling of 85943239 in words is "eighty-five million, nine hundred forty-three thousand, two hundred thirty-nine".