71945827 has 2 divisors, whose sum is σ = 71945828. Its totient is φ = 71945826.

The previous prime is 71945813. The next prime is 71945843. The reversal of 71945827 is 72854917.

It is a weak prime.

It is an emirp because it is prime and its reverse (72854917) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71945827 is a prime.

It is not a weakly prime, because it can be changed into another prime (71945227) 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, 35972913 + 35972914.

It is an arithmetic number, because the mean of its divisors is an integer number (35972914).

Almost surely, 2^71945827 is an apocalyptic number.

71945827 is a deficient number, since it is larger than the sum of its proper divisors (1).

71945827 is an equidigital number, since it uses as much as digits as its factorization.

71945827 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 141120, while the sum is 43.

The square root of 71945827 is about 8482.0885989242. The cubic root of 71945827 is about 415.9124010418.

The spelling of 71945827 in words is "seventy-one million, nine hundred forty-five thousand, eight hundred twenty-seven".