85019913 has 12 divisors (see below), whose sum is σ = 133970928. Its totient is φ = 51527160.

The previous prime is 85019911. The next prime is 85019929. The reversal of 85019913 is 31991058.

It is a happy number.

It is not a de Polignac number, because 85019913 - 2¹ = 85019911 is a prime.

It is not an unprimeable number, because it can be changed into a prime (85019911) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 429295 + ... + 429492.

It is an arithmetic number, because the mean of its divisors is an integer number (11164244).

Almost surely, 2^85019913 is an apocalyptic number.

It is an amenable number.

85019913 is a deficient number, since it is larger than the sum of its proper divisors (48951015).

85019913 is a wasteful number, since it uses less digits than its factorization.

85019913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858804 (or 858801 counting only the distinct ones).

The product of its (nonzero) digits is 9720, while the sum is 36.

The square root of 85019913 is about 9220.6243281027. The cubic root of 85019913 is about 439.7172994641.

The spelling of 85019913 in words is "eighty-five million, nineteen thousand, nine hundred thirteen".