71437253 has 2 divisors, whose sum is σ = 71437254. Its totient is φ = 71437252.

The previous prime is 71437231. The next prime is 71437271. The reversal of 71437253 is 35273417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 56055169 + 15382084 = 7487^2 + 3922^2 .

It is a cyclic number.

It is not a de Polignac number, because 71437253 - 2⁶ = 71437189 is a prime.

It is a super-2 number, since 2×71437253² = 10206562232372018, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71437273) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35718626 + 35718627.

It is an arithmetic number, because the mean of its divisors is an integer number (35718627).

Almost surely, 2^71437253 is an apocalyptic number.

It is an amenable number.

71437253 is a deficient number, since it is larger than the sum of its proper divisors (1).

71437253 is an equidigital number, since it uses as much as digits as its factorization.

71437253 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17640, while the sum is 32.

The square root of 71437253 is about 8452.0561403720. The cubic root of 71437253 is about 414.9300757982.

The spelling of 71437253 in words is "seventy-one million, four hundred thirty-seven thousand, two hundred fifty-three".