85643503 has 8 divisors (see below), whose sum is σ = 93650256. Its totient is φ = 77673600.

The previous prime is 85643497. The next prime is 85643521. The reversal of 85643503 is 30534658.

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

It is a cyclic number.

It is not a de Polignac number, because 85643503 - 2⁵ = 85643471 is a prime.

It is a super-2 number, since 2×85643503² = 14669619212222018, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85643303) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4228 + ... + 13753.

It is an arithmetic number, because the mean of its divisors is an integer number (11706282).

Almost surely, 2^85643503 is an apocalyptic number.

85643503 is a deficient number, since it is larger than the sum of its proper divisors (8006753).

85643503 is a wasteful number, since it uses less digits than its factorization.

85643503 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18425.

The product of its (nonzero) digits is 43200, while the sum is 34.

The square root of 85643503 is about 9254.3775047272. The cubic root of 85643503 is about 440.7897369902.

The spelling of 85643503 in words is "eighty-five million, six hundred forty-three thousand, five hundred three".