71861423 has 2 divisors, whose sum is σ = 71861424. Its totient is φ = 71861422.

The previous prime is 71861393. The next prime is 71861459. The reversal of 71861423 is 32416817.

It is a weak prime.

It is an emirp because it is prime and its reverse (32416817) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71861423 - 2¹² = 71857327 is a prime.

It is a Sophie Germain prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71861423.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71861723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35930711 + 35930712.

It is an arithmetic number, because the mean of its divisors is an integer number (35930712).

Almost surely, 2^71861423 is an apocalyptic number.

71861423 is a deficient number, since it is larger than the sum of its proper divisors (1).

71861423 is an equidigital number, since it uses as much as digits as its factorization.

71861423 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8064, while the sum is 32.

The square root of 71861423 is about 8477.1117133137. Note that the first 3 decimals coincide. The cubic root of 71861423 is about 415.7496934022.

The spelling of 71861423 in words is "seventy-one million, eight hundred sixty-one thousand, four hundred twenty-three".