71385253 has 2 divisors, whose sum is σ = 71385254. Its totient is φ = 71385252.

The previous prime is 71385241. The next prime is 71385263. The reversal of 71385253 is 35258317.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 50936769 + 20448484 = 7137^2 + 4522^2 .

It is a cyclic number.

It is not a de Polignac number, because 71385253 - 2¹⁷ = 71254181 is a prime.

It is equal to p_4194682 and since 71385253 and 4194682 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71385233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35692626 + 35692627.

It is an arithmetic number, because the mean of its divisors is an integer number (35692627).

Almost surely, 2^71385253 is an apocalyptic number.

It is an amenable number.

71385253 is a deficient number, since it is larger than the sum of its proper divisors (1).

71385253 is an equidigital number, since it uses as much as digits as its factorization.

71385253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25200, while the sum is 34.

The square root of 71385253 is about 8448.9794058217. The cubic root of 71385253 is about 414.8293738984.

The spelling of 71385253 in words is "seventy-one million, three hundred eighty-five thousand, two hundred fifty-three".