85740023 has 2 divisors, whose sum is σ = 85740024. Its totient is φ = 85740022.

The previous prime is 85740013. The next prime is 85740041. The reversal of 85740023 is 32004758.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85740023 - 2¹⁰ = 85738999 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85740013) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42870011 + 42870012.

It is an arithmetic number, because the mean of its divisors is an integer number (42870012).

Almost surely, 2^85740023 is an apocalyptic number.

85740023 is a deficient number, since it is larger than the sum of its proper divisors (1).

85740023 is an equidigital number, since it uses as much as digits as its factorization.

85740023 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6720, while the sum is 29.

The square root of 85740023 is about 9259.5908656916. The cubic root of 85740023 is about 440.9552644430.

The spelling of 85740023 in words is "eighty-five million, seven hundred forty thousand, twenty-three".