85819967 has 4 divisors (see below), whose sum is σ = 85839096. Its totient is φ = 85800840.

The previous prime is 85819963. The next prime is 85820023. The reversal of 85819967 is 76991858.

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

It is a cyclic number.

It is not a de Polignac number, because 85819967 - 2² = 85819963 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85819963) 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, 1217 + ... + 13157.

It is an arithmetic number, because the mean of its divisors is an integer number (21459774).

Almost surely, 2^85819967 is an apocalyptic number.

85819967 is a deficient number, since it is larger than the sum of its proper divisors (19129).

85819967 is a wasteful number, since it uses less digits than its factorization.

85819967 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19128.

The product of its digits is 1088640, while the sum is 53.

The square root of 85819967 is about 9263.9066813089. The cubic root of 85819967 is about 441.0922707708.

The spelling of 85819967 in words is "eighty-five million, eight hundred nineteen thousand, nine hundred sixty-seven".