85605797 has 4 divisors (see below), whose sum is σ = 85672800. Its totient is φ = 85538796.

The previous prime is 85605781. The next prime is 85605799. The reversal of 85605797 is 79750658.

It is a happy number.

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 85605797 - 2⁴ = 85605781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85605799) 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, 31547 + ... + 34152.

It is an arithmetic number, because the mean of its divisors is an integer number (21418200).

Almost surely, 2^85605797 is an apocalyptic number.

It is an amenable number.

85605797 is a deficient number, since it is larger than the sum of its proper divisors (67003).

85605797 is a wasteful number, since it uses less digits than its factorization.

85605797 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67002.

The product of its (nonzero) digits is 529200, while the sum is 47.

The square root of 85605797 is about 9252.3400823792. The cubic root of 85605797 is about 440.7250391167.

The spelling of 85605797 in words is "eighty-five million, six hundred five thousand, seven hundred ninety-seven".