85387613 has 2 divisors, whose sum is σ = 85387614. Its totient is φ = 85387612.

The previous prime is 85387597. The next prime is 85387619. The reversal of 85387613 is 31678358.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 81234169 + 4153444 = 9013^2 + 2038^2 .

It is a cyclic number.

It is not a de Polignac number, because 85387613 - 2⁴ = 85387597 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85387619) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42693806 + 42693807.

It is an arithmetic number, because the mean of its divisors is an integer number (42693807).

Almost surely, 2^85387613 is an apocalyptic number.

It is an amenable number.

85387613 is a deficient number, since it is larger than the sum of its proper divisors (1).

85387613 is an equidigital number, since it uses as much as digits as its factorization.

85387613 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 41.

The square root of 85387613 is about 9240.5418131190. The cubic root of 85387613 is about 440.3502943955.

The spelling of 85387613 in words is "eighty-five million, three hundred eighty-seven thousand, six hundred thirteen".