85440959 has 4 divisors (see below), whose sum is σ = 85506960. Its totient is φ = 85374960.

The previous prime is 85440911. The next prime is 85440961. The reversal of 85440959 is 95904458.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 85440959 - 2⁸ = 85440703 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 (85440259) 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, 31019 + ... + 33660.

It is an arithmetic number, because the mean of its divisors is an integer number (21376740).

Almost surely, 2^85440959 is an apocalyptic number.

85440959 is a deficient number, since it is larger than the sum of its proper divisors (66001).

85440959 is a wasteful number, since it uses less digits than its factorization.

85440959 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66000.

The product of its (nonzero) digits is 259200, while the sum is 44.

The square root of 85440959 is about 9243.4278814734. The cubic root of 85440959 is about 440.4419784063.

The spelling of 85440959 in words is "eighty-five million, four hundred forty thousand, nine hundred fifty-nine".