85670393 has 2 divisors, whose sum is σ = 85670394. Its totient is φ = 85670392.

The previous prime is 85670383. The next prime is 85670401. The reversal of 85670393 is 39307658.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 65885689 + 19784704 = 8117^2 + 4448^2 .

It is a cyclic number.

It is not a de Polignac number, because 85670393 - 2¹² = 85666297 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85670393.

It is not a weakly prime, because it can be changed into another prime (85670323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42835196 + 42835197.

It is an arithmetic number, because the mean of its divisors is an integer number (42835197).

Almost surely, 2^85670393 is an apocalyptic number.

It is an amenable number.

85670393 is a deficient number, since it is larger than the sum of its proper divisors (1).

85670393 is an equidigital number, since it uses as much as digits as its factorization.

85670393 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 136080, while the sum is 41.

The square root of 85670393 is about 9255.8302166796. The cubic root of 85670393 is about 440.8358646213.

The spelling of 85670393 in words is "eighty-five million, six hundred seventy thousand, three hundred ninety-three".