85370561 has 4 divisors (see below), whose sum is σ = 85728000. Its totient is φ = 85013124.

The previous prime is 85370557. The next prime is 85370587. The reversal of 85370561 is 16507358.

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 not a de Polignac number, because 85370561 - 2² = 85370557 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (85370521) 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, 178361 + ... + 178838.

It is an arithmetic number, because the mean of its divisors is an integer number (21432000).

Almost surely, 2^85370561 is an apocalyptic number.

It is an amenable number.

85370561 is a deficient number, since it is larger than the sum of its proper divisors (357439).

85370561 is a wasteful number, since it uses less digits than its factorization.

85370561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 357438.

The product of its (nonzero) digits is 25200, while the sum is 35.

The square root of 85370561 is about 9239.6190938804. The cubic root of 85370561 is about 440.3209796317.

The spelling of 85370561 in words is "eighty-five million, three hundred seventy thousand, five hundred sixty-one".