85921793 has 2 divisors, whose sum is σ = 85921794. Its totient is φ = 85921792.

The previous prime is 85921763. The next prime is 85921817. The reversal of 85921793 is 39712958.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48553024 + 37368769 = 6968^2 + 6113^2 .

It is a cyclic number.

It is not a de Polignac number, because 85921793 - 2¹² = 85917697 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85921753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42960896 + 42960897.

It is an arithmetic number, because the mean of its divisors is an integer number (42960897).

Almost surely, 2^85921793 is an apocalyptic number.

It is an amenable number.

85921793 is a deficient number, since it is larger than the sum of its proper divisors (1).

85921793 is an equidigital number, since it uses as much as digits as its factorization.

85921793 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 136080, while the sum is 44.

The square root of 85921793 is about 9269.4008975769. The cubic root of 85921793 is about 441.2666548564.

The spelling of 85921793 in words is "eighty-five million, nine hundred twenty-one thousand, seven hundred ninety-three".