85280197 has 4 divisors (see below), whose sum is σ = 85359456. Its totient is φ = 85200940.

The previous prime is 85280149. The next prime is 85280201. The reversal of 85280197 is 79108258.

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: 79108258 = 2 ⋅39554129.

It is a cyclic number.

It is not a de Polignac number, because 85280197 - 2²³ = 76891589 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (85280147) 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, 37993 + ... + 40174.

It is an arithmetic number, because the mean of its divisors is an integer number (21339864).

Almost surely, 2^85280197 is an apocalyptic number.

It is an amenable number.

85280197 is a deficient number, since it is larger than the sum of its proper divisors (79259).

85280197 is a wasteful number, since it uses less digits than its factorization.

85280197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79258.

The product of its (nonzero) digits is 40320, while the sum is 40.

The square root of 85280197 is about 9234.7277707575. The cubic root of 85280197 is about 440.1655661354.

The spelling of 85280197 in words is "eighty-five million, two hundred eighty thousand, one hundred ninety-seven".