85471387 has 2 divisors, whose sum is σ = 85471388. Its totient is φ = 85471386.

The previous prime is 85471363. The next prime is 85471403. The reversal of 85471387 is 78317458.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85471387 - 2²³ = 77082779 is a prime.

It is not a weakly prime, because it can be changed into another prime (85471307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42735693 + 42735694.

It is an arithmetic number, because the mean of its divisors is an integer number (42735694).

Almost surely, 2^85471387 is an apocalyptic number.

85471387 is a deficient number, since it is larger than the sum of its proper divisors (1).

85471387 is an equidigital number, since it uses as much as digits as its factorization.

85471387 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 188160, while the sum is 43.

The square root of 85471387 is about 9245.0736611452. The cubic root of 85471387 is about 440.4942569156.

It can be divided in two parts, 85471 and 387, that added together give a palindrome (85858).

The spelling of 85471387 in words is "eighty-five million, four hundred seventy-one thousand, three hundred eighty-seven".