85539791 has 2 divisors, whose sum is σ = 85539792. Its totient is φ = 85539790.

The previous prime is 85539761. The next prime is 85539803. The reversal of 85539791 is 19793558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85539791 - 2²² = 81345487 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85539761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42769895 + 42769896.

It is an arithmetic number, because the mean of its divisors is an integer number (42769896).

Almost surely, 2^85539791 is an apocalyptic number.

85539791 is a deficient number, since it is larger than the sum of its proper divisors (1).

85539791 is an equidigital number, since it uses as much as digits as its factorization.

85539791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 340200, while the sum is 47.

The square root of 85539791 is about 9248.7724050276. The cubic root of 85539791 is about 440.6117369111.

The spelling of 85539791 in words is "eighty-five million, five hundred thirty-nine thousand, seven hundred ninety-one".