85438569 has 8 divisors (see below), whose sum is σ = 114617632. Its totient is φ = 56609280.

The previous prime is 85438567. The next prime is 85438571. The reversal of 85438569 is 96583458.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (85438567) and next prime (85438571).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85438569 - 2¹ = 85438567 is a prime.

It is a super-2 number, since 2×85438569² = 14599498145535522, which contains 22 as substring.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85438567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86872 + ... + 87849.

It is an arithmetic number, because the mean of its divisors is an integer number (14327204).

Almost surely, 2^85438569 is an apocalyptic number.

It is an amenable number.

85438569 is a deficient number, since it is larger than the sum of its proper divisors (29179063).

85438569 is a wasteful number, since it uses less digits than its factorization.

85438569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174887.

The product of its digits is 1036800, while the sum is 48.

The square root of 85438569 is about 9243.2985995260. The cubic root of 85438569 is about 440.4378716088.

The spelling of 85438569 in words is "eighty-five million, four hundred thirty-eight thousand, five hundred sixty-nine".