85939739 has 2 divisors, whose sum is σ = 85939740. Its totient is φ = 85939738.

The previous prime is 85939729. The next prime is 85939747. The reversal of 85939739 is 93793958.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85939739 - 2⁴ = 85939723 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85939729) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42969869 + 42969870.

It is an arithmetic number, because the mean of its divisors is an integer number (42969870).

Almost surely, 2^85939739 is an apocalyptic number.

85939739 is a deficient number, since it is larger than the sum of its proper divisors (1).

85939739 is an equidigital number, since it uses as much as digits as its factorization.

85939739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1837080, while the sum is 53.

The square root of 85939739 is about 9270.3688707624. The cubic root of 85939739 is about 441.2973743430.

The spelling of 85939739 in words is "eighty-five million, nine hundred thirty-nine thousand, seven hundred thirty-nine".