85729393 has 2 divisors, whose sum is σ = 85729394. Its totient is φ = 85729392.

The previous prime is 85729373. The next prime is 85729403. The reversal of 85729393 is 39392758.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56655729 + 29073664 = 7527^2 + 5392^2 .

It is a cyclic number.

It is not a de Polignac number, because 85729393 - 2²⁵ = 52174961 is a prime.

It is not a weakly prime, because it can be changed into another prime (85729373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42864696 + 42864697.

It is an arithmetic number, because the mean of its divisors is an integer number (42864697).

Almost surely, 2^85729393 is an apocalyptic number.

It is an amenable number.

85729393 is a deficient number, since it is larger than the sum of its proper divisors (1).

85729393 is an equidigital number, since it uses as much as digits as its factorization.

85729393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 408240, while the sum is 46.

The square root of 85729393 is about 9259.0168484564. The cubic root of 85729393 is about 440.9370405610.

The spelling of 85729393 in words is "eighty-five million, seven hundred twenty-nine thousand, three hundred ninety-three".