85225979 has 2 divisors, whose sum is σ = 85225980. Its totient is φ = 85225978.

The previous prime is 85225951. The next prime is 85225991. The reversal of 85225979 is 97952258.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85225979 - 2²⁰ = 84177403 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85225949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42612989 + 42612990.

It is an arithmetic number, because the mean of its divisors is an integer number (42612990).

Almost surely, 2^85225979 is an apocalyptic number.

85225979 is a deficient number, since it is larger than the sum of its proper divisors (1).

85225979 is an equidigital number, since it uses as much as digits as its factorization.

85225979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 453600, while the sum is 47.

The square root of 85225979 is about 9231.7917545837. The cubic root of 85225979 is about 440.0722660229.

The spelling of 85225979 in words is "eighty-five million, two hundred twenty-five thousand, nine hundred seventy-nine".