71000537 has 2 divisors, whose sum is σ = 71000538. Its totient is φ = 71000536.

The previous prime is 71000533. The next prime is 71000543. The reversal of 71000537 is 73500017.

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., 70627216 + 373321 = 8404^2 + 611^2 .

It is a cyclic number.

It is not a de Polignac number, because 71000537 - 2² = 71000533 is a prime.

It is a super-3 number, since 3×71000537³ (a number of 25 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (71000533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35500268 + 35500269.

It is an arithmetic number, because the mean of its divisors is an integer number (35500269).

Almost surely, 2^71000537 is an apocalyptic number.

It is an amenable number.

71000537 is a deficient number, since it is larger than the sum of its proper divisors (1).

71000537 is an equidigital number, since it uses as much as digits as its factorization.

71000537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 735, while the sum is 23.

The square root of 71000537 is about 8426.1816382036. The cubic root of 71000537 is about 414.0828188923.

The spelling of 71000537 in words is "seventy-one million, five hundred thirty-seven", and thus it is an aban number.