85539761 has 2 divisors, whose sum is σ = 85539762. Its totient is φ = 85539760.

The previous prime is 85539743. The next prime is 85539791. The reversal of 85539761 is 16793558.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52649536 + 32890225 = 7256^2 + 5735^2 .

It is a cyclic number.

It is not a de Polignac number, because 85539761 - 2¹⁰ = 85538737 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85539791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42769880 + 42769881.

It is an arithmetic number, because the mean of its divisors is an integer number (42769881).

Almost surely, 2^85539761 is an apocalyptic number.

It is an amenable number.

85539761 is a deficient number, since it is larger than the sum of its proper divisors (1).

85539761 is an equidigital number, since it uses as much as digits as its factorization.

85539761 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 44.

The square root of 85539761 is about 9248.7707831906. The cubic root of 85539761 is about 440.6116854015.

The spelling of 85539761 in words is "eighty-five million, five hundred thirty-nine thousand, seven hundred sixty-one".