85331839 has 2 divisors, whose sum is σ = 85331840. Its totient is φ = 85331838.

The previous prime is 85331821. The next prime is 85331861. The reversal of 85331839 is 93813358.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85331839 - 2⁹ = 85331327 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85311839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42665919 + 42665920.

It is an arithmetic number, because the mean of its divisors is an integer number (42665920).

Almost surely, 2^85331839 is an apocalyptic number.

85331839 is a deficient number, since it is larger than the sum of its proper divisors (1).

85331839 is an equidigital number, since it uses as much as digits as its factorization.

85331839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 40.

The square root of 85331839 is about 9237.5234235156. The cubic root of 85331839 is about 440.2543966189.

The spelling of 85331839 in words is "eighty-five million, three hundred thirty-one thousand, eight hundred thirty-nine".