71709133 has 2 divisors, whose sum is σ = 71709134. Its totient is φ = 71709132.

The previous prime is 71709067. The next prime is 71709137. The reversal of 71709133 is 33190717.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 71690089 + 19044 = 8467^2 + 138^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71709133 is a prime.

It is a super-2 number, since 2×71709133² = 10284399511223378, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71709095 and 71709104.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71709137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35854566 + 35854567.

It is an arithmetic number, because the mean of its divisors is an integer number (35854567).

Almost surely, 2^71709133 is an apocalyptic number.

It is an amenable number.

71709133 is a deficient number, since it is larger than the sum of its proper divisors (1).

71709133 is an equidigital number, since it uses as much as digits as its factorization.

71709133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3969, while the sum is 31.

The square root of 71709133 is about 8468.1245267178. The cubic root of 71709133 is about 415.4557976575.

The spelling of 71709133 in words is "seventy-one million, seven hundred nine thousand, one hundred thirty-three".