85978723 has 2 divisors, whose sum is σ = 85978724. Its totient is φ = 85978722.

The previous prime is 85978721. The next prime is 85978729. The reversal of 85978723 is 32787958.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85978723 - 2¹ = 85978721 is a prime.

Together with 85978721, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (85978721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42989361 + 42989362.

It is an arithmetic number, because the mean of its divisors is an integer number (42989362).

Almost surely, 2^85978723 is an apocalyptic number.

85978723 is a deficient number, since it is larger than the sum of its proper divisors (1).

85978723 is an equidigital number, since it uses as much as digits as its factorization.

85978723 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 846720, while the sum is 49.

The square root of 85978723 is about 9272.4712455742. The cubic root of 85978723 is about 441.3640913877.

The spelling of 85978723 in words is "eighty-five million, nine hundred seventy-eight thousand, seven hundred twenty-three".