85537279 has 2 divisors, whose sum is σ = 85537280. Its totient is φ = 85537278.

The previous prime is 85537241. The next prime is 85537289. The reversal of 85537279 is 97273558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85537279 - 2¹⁷ = 85406207 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 (85537289) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42768639 + 42768640.

It is an arithmetic number, because the mean of its divisors is an integer number (42768640).

Almost surely, 2^85537279 is an apocalyptic number.

85537279 is a deficient number, since it is larger than the sum of its proper divisors (1).

85537279 is an equidigital number, since it uses as much as digits as its factorization.

85537279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 529200, while the sum is 46.

The square root of 85537279 is about 9248.6366022241. The cubic root of 85537279 is about 440.6074238014.

The spelling of 85537279 in words is "eighty-five million, five hundred thirty-seven thousand, two hundred seventy-nine".