85091269 has 2 divisors, whose sum is σ = 85091270. Its totient is φ = 85091268.

The previous prime is 85091267. The next prime is 85091297. The reversal of 85091269 is 96219058.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 71622369 + 13468900 = 8463^2 + 3670^2 .

It is a cyclic number.

It is not a de Polignac number, because 85091269 - 2¹ = 85091267 is a prime.

It is a super-2 number, since 2×85091269² = 14481048120060722, which contains 22 as substring.

Together with 85091267, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85091263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42545634 + 42545635.

It is an arithmetic number, because the mean of its divisors is an integer number (42545635).

Almost surely, 2^85091269 is an apocalyptic number.

It is an amenable number.

85091269 is a deficient number, since it is larger than the sum of its proper divisors (1).

85091269 is an equidigital number, since it uses as much as digits as its factorization.

85091269 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 40.

The square root of 85091269 is about 9224.4928857905. The cubic root of 85091269 is about 439.8402812169.

The spelling of 85091269 in words is "eighty-five million, ninety-one thousand, two hundred sixty-nine".