85269991 has 2 divisors, whose sum is σ = 85269992. Its totient is φ = 85269990.

The previous prime is 85269973. The next prime is 85270001. The reversal of 85269991 is 19996258.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85269991 - 2⁹ = 85269479 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85269911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42634995 + 42634996.

It is an arithmetic number, because the mean of its divisors is an integer number (42634996).

Almost surely, 2^85269991 is an apocalyptic number.

85269991 is a deficient number, since it is larger than the sum of its proper divisors (1).

85269991 is an equidigital number, since it uses as much as digits as its factorization.

85269991 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 349920, while the sum is 49.

The square root of 85269991 is about 9234.1751661965. The cubic root of 85269991 is about 440.1480063378.

The spelling of 85269991 in words is "eighty-five million, two hundred sixty-nine thousand, nine hundred ninety-one".