71939471 has 2 divisors, whose sum is σ = 71939472. Its totient is φ = 71939470.

The previous prime is 71939443. The next prime is 71939479. The reversal of 71939471 is 17493917.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71939471 - 2⁶ = 71939407 is a prime.

It is a super-3 number, since 3×71939471³ (a number of 25 digits) contains 333 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 (71939479) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35969735 + 35969736.

It is an arithmetic number, because the mean of its divisors is an integer number (35969736).

Almost surely, 2^71939471 is an apocalyptic number.

71939471 is a deficient number, since it is larger than the sum of its proper divisors (1).

71939471 is an equidigital number, since it uses as much as digits as its factorization.

71939471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 47628, while the sum is 41.

The square root of 71939471 is about 8481.7139187784. The cubic root of 71939471 is about 415.9001528583.

The spelling of 71939471 in words is "seventy-one million, nine hundred thirty-nine thousand, four hundred seventy-one".