85003921 has 8 divisors (see below), whose sum is σ = 86710400. Its totient is φ = 83313360.

The previous prime is 85003909. The next prime is 85003931. The reversal of 85003921 is 12930058.

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 85003921 - 2²³ = 76615313 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85003921.

It is not an unprimeable number, because it can be changed into a prime (85003931) 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, 7111 + ... + 14851.

It is an arithmetic number, because the mean of its divisors is an integer number (10838800).

Almost surely, 2^85003921 is an apocalyptic number.

It is an amenable number.

85003921 is a deficient number, since it is larger than the sum of its proper divisors (1706479).

85003921 is a wasteful number, since it uses less digits than its factorization.

85003921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7959.

The product of its (nonzero) digits is 2160, while the sum is 28.

The square root of 85003921 is about 9219.7571009219. The cubic root of 85003921 is about 439.6897278841.

Adding to 85003921 its reverse (12930058), we get a palindrome (97933979).

It can be divided in two parts, 8500 and 3921, that added together give a palindrome (12421).

The spelling of 85003921 in words is "eighty-five million, three thousand, nine hundred twenty-one".