85991067 has 6 divisors (see below), whose sum is σ = 124209332. Its totient is φ = 57327372.

The previous prime is 85991053. The next prime is 85991077. The reversal of 85991067 is 76019958.

It is not a de Polignac number, because 85991067 - 2⁷ = 85990939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85991077) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4777273 + ... + 4777290.

Almost surely, 2^85991067 is an apocalyptic number.

85991067 is a deficient number, since it is larger than the sum of its proper divisors (38218265).

85991067 is a wasteful number, since it uses less digits than its factorization.

85991067 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9554569 (or 9554566 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 85991067 is about 9273.1368479064. The cubic root of 85991067 is about 441.3852126505.

The spelling of 85991067 in words is "eighty-five million, nine hundred ninety-one thousand, sixty-seven".