85144479 has 8 divisors (see below), whose sum is σ = 129744000. Its totient is φ = 48653976.

The previous prime is 85144469. The next prime is 85144487. The reversal of 85144479 is 97444158.

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

It is not a de Polignac number, because 85144479 - 2⁴ = 85144463 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85144479.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85144469) 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, 2027229 + ... + 2027270.

It is an arithmetic number, because the mean of its divisors is an integer number (16218000).

Almost surely, 2^85144479 is an apocalyptic number.

85144479 is a deficient number, since it is larger than the sum of its proper divisors (44599521).

85144479 is a wasteful number, since it uses less digits than its factorization.

85144479 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4054509.

The product of its digits is 161280, while the sum is 42.

The square root of 85144479 is about 9227.3766044310. The cubic root of 85144479 is about 439.9319436751.

The spelling of 85144479 in words is "eighty-five million, one hundred forty-four thousand, four hundred seventy-nine".