85509903 has 4 divisors (see below), whose sum is σ = 114013208. Its totient is φ = 57006600.

The previous prime is 85509901. The next prime is 85509917. The reversal of 85509903 is 30990558.

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

It is not a de Polignac number, because 85509903 - 2¹ = 85509901 is a prime.

It is a super-2 number, since 2×85509903² = 14623887022138818, 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 (85509901) 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 3 ways as a sum of consecutive naturals, for example, 14251648 + ... + 14251653.

It is an arithmetic number, because the mean of its divisors is an integer number (28503302).

Almost surely, 2^85509903 is an apocalyptic number.

85509903 is a deficient number, since it is larger than the sum of its proper divisors (28503305).

85509903 is a wasteful number, since it uses less digits than its factorization.

85509903 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28503304.

The product of its (nonzero) digits is 48600, while the sum is 39.

The square root of 85509903 is about 9247.1564818597. The cubic root of 85509903 is about 440.5604136711.

The spelling of 85509903 in words is "eighty-five million, five hundred nine thousand, nine hundred three".