85131073 has 4 divisors (see below), whose sum is σ = 88832448. Its totient is φ = 81429700.

The previous prime is 85131061. The next prime is 85131103. The reversal of 85131073 is 37013158.

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 a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85131073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85131023) 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, 1850653 + ... + 1850698.

It is an arithmetic number, because the mean of its divisors is an integer number (22208112).

Almost surely, 2^85131073 is an apocalyptic number.

It is an amenable number.

85131073 is a deficient number, since it is larger than the sum of its proper divisors (3701375).

85131073 is a wasteful number, since it uses less digits than its factorization.

85131073 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3701374.

The product of its (nonzero) digits is 2520, while the sum is 28.

The square root of 85131073 is about 9226.6501505151. The cubic root of 85131073 is about 439.9088533653.

The spelling of 85131073 in words is "eighty-five million, one hundred thirty-one thousand, seventy-three".