85278311 has 2 divisors, whose sum is σ = 85278312. Its totient is φ = 85278310.

The previous prime is 85278293. The next prime is 85278317. The reversal of 85278311 is 11387258.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85278311 - 2⁶ = 85278247 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85278317) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42639155 + 42639156.

It is an arithmetic number, because the mean of its divisors is an integer number (42639156).

Almost surely, 2^85278311 is an apocalyptic number.

85278311 is a deficient number, since it is larger than the sum of its proper divisors (1).

85278311 is an equidigital number, since it uses as much as digits as its factorization.

85278311 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 13440, while the sum is 35.

The square root of 85278311 is about 9234.6256556506. The cubic root of 85278311 is about 440.1623213087.

The spelling of 85278311 in words is "eighty-five million, two hundred seventy-eight thousand, three hundred eleven".