85744553 has 4 divisors (see below), whose sum is σ = 85822980. Its totient is φ = 85666128.

The previous prime is 85744517. The next prime is 85744567. The reversal of 85744553 is 35544758.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23697424 + 62047129 = 4868^2 + 7877^2 .

It is a cyclic number.

It is not a de Polignac number, because 85744553 - 2⁸ = 85744297 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 85744553.

It is not an unprimeable number, because it can be changed into a prime (85744573) 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, 37550 + ... + 39767.

It is an arithmetic number, because the mean of its divisors is an integer number (21455745).

Almost surely, 2^85744553 is an apocalyptic number.

It is an amenable number.

85744553 is a deficient number, since it is larger than the sum of its proper divisors (78427).

85744553 is a wasteful number, since it uses less digits than its factorization.

85744553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78426.

The product of its digits is 336000, while the sum is 41.

The square root of 85744553 is about 9259.8354737004. The cubic root of 85744553 is about 440.9630301363.

The spelling of 85744553 in words is "eighty-five million, seven hundred forty-four thousand, five hundred fifty-three".