85440053 has 4 divisors (see below), whose sum is σ = 85869600. Its totient is φ = 85010508.

The previous prime is 85440013. The next prime is 85440071. The reversal of 85440053 is 35004458.

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, and also an emirpimes, since its reverse is a distinct semiprime: 35004458 = 2 ⋅17502229.

It is a cyclic number.

It is not a de Polignac number, because 85440053 - 2⁶ = 85439989 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 85439998 and 85440025.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85440013) 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, 214475 + ... + 214872.

It is an arithmetic number, because the mean of its divisors is an integer number (21467400).

Almost surely, 2^85440053 is an apocalyptic number.

It is an amenable number.

85440053 is a deficient number, since it is larger than the sum of its proper divisors (429547).

85440053 is a wasteful number, since it uses less digits than its factorization.

85440053 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 429546.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 85440053 is about 9243.3788735505. The cubic root of 85440053 is about 440.4404216126.

The spelling of 85440053 in words is "eighty-five million, four hundred forty thousand, fifty-three".