85012513 has 2 divisors, whose sum is σ = 85012514. Its totient is φ = 85012512.

The previous prime is 85012507. The next prime is 85012553. The reversal of 85012513 is 31521058.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 84511249 + 501264 = 9193^2 + 708^2 .

It is a cyclic number.

It is not a de Polignac number, because 85012513 - 2²¹ = 82915361 is a prime.

It is not a weakly prime, because it can be changed into another prime (85012553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42506256 + 42506257.

It is an arithmetic number, because the mean of its divisors is an integer number (42506257).

Almost surely, 2^85012513 is an apocalyptic number.

It is an amenable number.

85012513 is a deficient number, since it is larger than the sum of its proper divisors (1).

85012513 is an equidigital number, since it uses as much as digits as its factorization.

85012513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 25.

The square root of 85012513 is about 9220.2230450245. The cubic root of 85012513 is about 439.7045416590.

It can be divided in two parts, 8 and 5012513, that multiplied together give a palindrome (40100104).

The spelling of 85012513 in words is "eighty-five million, twelve thousand, five hundred thirteen".