71072537 has 2 divisors, whose sum is σ = 71072538. Its totient is φ = 71072536.

The previous prime is 71072527. The next prime is 71072543. The reversal of 71072537 is 73527017.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55517401 + 15555136 = 7451^2 + 3944^2 .

It is a cyclic number.

It is not a de Polignac number, because 71072537 - 2¹⁰ = 71071513 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (71072527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35536268 + 35536269.

It is an arithmetic number, because the mean of its divisors is an integer number (35536269).

Almost surely, 2^71072537 is an apocalyptic number.

It is an amenable number.

71072537 is a deficient number, since it is larger than the sum of its proper divisors (1).

71072537 is an equidigital number, since it uses as much as digits as its factorization.

71072537 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10290, while the sum is 32.

The square root of 71072537 is about 8430.4529534302. The cubic root of 71072537 is about 414.2227422037. Note that the first 3 decimals are identical.

The spelling of 71072537 in words is "seventy-one million, seventy-two thousand, five hundred thirty-seven".