85877989 has 8 divisors (see below), whose sum is σ = 86484960. Its totient is φ = 85273776.

The previous prime is 85877951. The next prime is 85878041. The reversal of 85877989 is 98977858.

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 85877989 - 2¹⁷ = 85746917 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 (85877089) 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, 131187 + ... + 131839.

It is an arithmetic number, because the mean of its divisors is an integer number (10810620).

Almost surely, 2^85877989 is an apocalyptic number.

It is an amenable number.

85877989 is a deficient number, since it is larger than the sum of its proper divisors (606971).

85877989 is a wasteful number, since it uses less digits than its factorization.

85877989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379.

The product of its digits is 10160640, while the sum is 61.

The square root of 85877989 is about 9267.0377683486. The cubic root of 85877989 is about 441.1916543644.

The spelling of 85877989 in words is "eighty-five million, eight hundred seventy-seven thousand, nine hundred eighty-nine".