85704197 has 2 divisors, whose sum is σ = 85704198. Its totient is φ = 85704196.

The previous prime is 85704169. The next prime is 85704209. The reversal of 85704197 is 79140758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 74407876 + 11296321 = 8626^2 + 3361^2 .

It is a cyclic number.

It is not a de Polignac number, because 85704197 - 2¹² = 85700101 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85704107) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42852098 + 42852099.

It is an arithmetic number, because the mean of its divisors is an integer number (42852099).

Almost surely, 2^85704197 is an apocalyptic number.

It is an amenable number.

85704197 is a deficient number, since it is larger than the sum of its proper divisors (1).

85704197 is an equidigital number, since it uses as much as digits as its factorization.

85704197 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 70560, while the sum is 41.

The square root of 85704197 is about 9257.6561288482. The cubic root of 85704197 is about 440.8938389710.

The spelling of 85704197 in words is "eighty-five million, seven hundred four thousand, one hundred ninety-seven".