85001989 has 8 divisors (see below), whose sum is σ = 90713088. Its totient is φ = 79369920.

The previous prime is 85001963. The next prime is 85001999. The reversal of 85001989 is 98910058.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 85001989 - 2⁵ = 85001957 is a prime.

It is a super-2 number, since 2×85001989² = 14450676267912242, which contains 22 as substring.

85001989 is a modest number, since divided by 1989 gives 85 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85001999) 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, 17527 + ... + 21844.

It is an arithmetic number, because the mean of its divisors is an integer number (11339136).

Almost surely, 2^85001989 is an apocalyptic number.

It is an amenable number.

85001989 is a deficient number, since it is larger than the sum of its proper divisors (5711099).

85001989 is a wasteful number, since it uses less digits than its factorization.

85001989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39515.

The product of its (nonzero) digits is 25920, while the sum is 40.

The square root of 85001989 is about 9219.6523253320. The cubic root of 85001989 is about 439.6863967162.

The spelling of 85001989 in words is "eighty-five million, one thousand, nine hundred eighty-nine".