71538461 has 2 divisors, whose sum is σ = 71538462. Its totient is φ = 71538460.

The previous prime is 71538451. The next prime is 71538491. The reversal of 71538461 is 16483517.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 56715961 + 14822500 = 7531^2 + 3850^2 .

It is a cyclic number.

It is not a de Polignac number, because 71538461 - 2²⁶ = 4429597 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71538451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35769230 + 35769231.

It is an arithmetic number, because the mean of its divisors is an integer number (35769231).

Almost surely, 2^71538461 is an apocalyptic number.

It is an amenable number.

71538461 is a deficient number, since it is larger than the sum of its proper divisors (1).

71538461 is an equidigital number, since it uses as much as digits as its factorization.

71538461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20160, while the sum is 35.

The square root of 71538461 is about 8458.0412034939. The cubic root of 71538461 is about 415.1259326530.

The spelling of 71538461 in words is "seventy-one million, five hundred thirty-eight thousand, four hundred sixty-one".