85513889 has 4 divisors (see below), whose sum is σ = 90014640. Its totient is φ = 81013140.

The previous prime is 85513873. The next prime is 85513907. The reversal of 85513889 is 98831558.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 85513889 - 2⁴ = 85513873 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85513819) 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, 2250347 + ... + 2250384.

It is an arithmetic number, because the mean of its divisors is an integer number (22503660).

Almost surely, 2^85513889 is an apocalyptic number.

It is an amenable number.

85513889 is a deficient number, since it is larger than the sum of its proper divisors (4500751).

85513889 is a wasteful number, since it uses less digits than its factorization.

85513889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4500750.

The product of its digits is 345600, while the sum is 47.

The square root of 85513889 is about 9247.3720050618. The cubic root of 85513889 is about 440.5672590636.

The spelling of 85513889 in words is "eighty-five million, five hundred thirteen thousand, eight hundred eighty-nine".