85701989 has 8 divisors (see below), whose sum is σ = 93324000. Its totient is φ = 78391152.

The previous prime is 85701929. The next prime is 85701991. The reversal of 85701989 is 98910758.

It is a happy number.

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 85701989 - 2²⁴ = 68924773 is a prime.

It is a super-2 number, since 2×85701989² = 14689661837112242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85701929) 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, 77219 + ... + 78320.

It is an arithmetic number, because the mean of its divisors is an integer number (11665500).

Almost surely, 2^85701989 is an apocalyptic number.

It is an amenable number.

85701989 is a deficient number, since it is larger than the sum of its proper divisors (7622011).

85701989 is a wasteful number, since it uses less digits than its factorization.

85701989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155587.

The product of its (nonzero) digits is 181440, while the sum is 47.

The square root of 85701989 is about 9257.5368754329. The cubic root of 85701989 is about 440.8900526844.

The spelling of 85701989 in words is "eighty-five million, seven hundred one thousand, nine hundred eighty-nine".