85740049 has 2 divisors, whose sum is σ = 85740050. Its totient is φ = 85740048.

The previous prime is 85740047. The next prime is 85740059. The reversal of 85740049 is 94004758.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57988225 + 27751824 = 7615^2 + 5268^2 .

It is a cyclic number.

It is not a de Polignac number, because 85740049 - 2¹ = 85740047 is a prime.

Together with 85740047, it forms a pair of twin primes.

It is a Chen prime.

It is equal to p_4984246 and since 85740049 and 4984246 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (85740041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42870024 + 42870025.

It is an arithmetic number, because the mean of its divisors is an integer number (42870025).

Almost surely, 2^85740049 is an apocalyptic number.

It is an amenable number.

85740049 is a deficient number, since it is larger than the sum of its proper divisors (1).

85740049 is an equidigital number, since it uses as much as digits as its factorization.

85740049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40320, while the sum is 37.

The square root of 85740049 is about 9259.5922696413. The cubic root of 85740049 is about 440.9553090151.

The spelling of 85740049 in words is "eighty-five million, seven hundred forty thousand, forty-nine".