85567439 has 4 divisors (see below), whose sum is σ = 86598456. Its totient is φ = 84536424.

The previous prime is 85567397. The next prime is 85567457. The reversal of 85567439 is 93476558.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85567439 - 2¹⁶ = 85501903 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85567393 and 85567402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85567459) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 515384 + ... + 515549.

It is an arithmetic number, because the mean of its divisors is an integer number (21649614).

Almost surely, 2^85567439 is an apocalyptic number.

85567439 is a deficient number, since it is larger than the sum of its proper divisors (1031017).

85567439 is a wasteful number, since it uses less digits than its factorization.

85567439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1031016.

The product of its digits is 907200, while the sum is 47.

The square root of 85567439 is about 9250.2669691204. The cubic root of 85567439 is about 440.6592030120.

The spelling of 85567439 in words is "eighty-five million, five hundred sixty-seven thousand, four hundred thirty-nine".