85391489 has 4 divisors (see below), whose sum is σ = 85796400. Its totient is φ = 84986580.

The previous prime is 85391483. The next prime is 85391519. The reversal of 85391489 is 98419358.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 85391489 - 2⁴ = 85391473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (85391483) 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, 202139 + ... + 202560.

It is an arithmetic number, because the mean of its divisors is an integer number (21449100).

Almost surely, 2^85391489 is an apocalyptic number.

It is an amenable number.

85391489 is a deficient number, since it is larger than the sum of its proper divisors (404911).

85391489 is a wasteful number, since it uses less digits than its factorization.

85391489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 404910.

The product of its digits is 311040, while the sum is 47.

The square root of 85391489 is about 9240.7515387007. The cubic root of 85391489 is about 440.3569572351.

The spelling of 85391489 in words is "eighty-five million, three hundred ninety-one thousand, four hundred eighty-nine".