71388253 has 12 divisors (see below), whose sum is σ = 77270652. Its totient is φ = 65724800.

The previous prime is 71388241. The next prime is 71388259. The reversal of 71388253 is 35288317.

It can be written as a sum of positive squares in 2 ways, for example, as 28708164 + 42680089 = 5358^2 + 6533^2 .

It is not a de Polignac number, because 71388253 - 2¹³ = 71380061 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71388259) 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 in 11 ways as a sum of consecutive naturals, for example, 36603 + ... + 38503.

It is an arithmetic number, because the mean of its divisors is an integer number (6439221).

Almost surely, 2^71388253 is an apocalyptic number.

It is an amenable number.

71388253 is a deficient number, since it is larger than the sum of its proper divisors (5882399).

71388253 is a wasteful number, since it uses less digits than its factorization.

71388253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2012 (or 1965 counting only the distinct ones).

The product of its digits is 40320, while the sum is 37.

The square root of 71388253 is about 8449.1569401923. The cubic root of 71388253 is about 414.8351849524.

The spelling of 71388253 in words is "seventy-one million, three hundred eighty-eight thousand, two hundred fifty-three".