85236979 has 2 divisors, whose sum is σ = 85236980. Its totient is φ = 85236978.

The previous prime is 85236973. The next prime is 85236989. The reversal of 85236979 is 97963258.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85236979 - 2⁹ = 85236467 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (85236973) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42618489 + 42618490.

It is an arithmetic number, because the mean of its divisors is an integer number (42618490).

Almost surely, 2^85236979 is an apocalyptic number.

85236979 is a deficient number, since it is larger than the sum of its proper divisors (1).

85236979 is an equidigital number, since it uses as much as digits as its factorization.

85236979 is an evil number, because the sum of its binary digits is even.

The product of its digits is 816480, while the sum is 49.

The square root of 85236979 is about 9232.3875026994. The cubic root of 85236979 is about 440.0911983826.

The spelling of 85236979 in words is "eighty-five million, two hundred thirty-six thousand, nine hundred seventy-nine".