71238743 has 2 divisors, whose sum is σ = 71238744. Its totient is φ = 71238742.

The previous prime is 71238709. The next prime is 71238749. The reversal of 71238743 is 34783217.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71238743 - 2²⁴ = 54461527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71238749) 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, 35619371 + 35619372.

It is an arithmetic number, because the mean of its divisors is an integer number (35619372).

Almost surely, 2^71238743 is an apocalyptic number.

71238743 is a deficient number, since it is larger than the sum of its proper divisors (1).

71238743 is an equidigital number, since it uses as much as digits as its factorization.

71238743 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 35.

The square root of 71238743 is about 8440.3046745956. The cubic root of 71238743 is about 414.5453830389.

It can be divided in two parts, 71 and 238743, that multiplied together give a triangular number (16950753 = T₅₈₂₂).

The spelling of 71238743 in words is "seventy-one million, two hundred thirty-eight thousand, seven hundred forty-three".