71279123 has 2 divisors, whose sum is σ = 71279124. Its totient is φ = 71279122.

The previous prime is 71279111. The next prime is 71279141. The reversal of 71279123 is 32197217.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71279123 - 2⁶ = 71279059 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71279123.

It is not a weakly prime, because it can be changed into another prime (71279183) 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, 35639561 + 35639562.

It is an arithmetic number, because the mean of its divisors is an integer number (35639562).

Almost surely, 2^71279123 is an apocalyptic number.

71279123 is a deficient number, since it is larger than the sum of its proper divisors (1).

71279123 is an equidigital number, since it uses as much as digits as its factorization.

71279123 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5292, while the sum is 32.

The square root of 71279123 is about 8442.6964294590. The cubic root of 71279123 is about 414.6236933332.

The spelling of 71279123 in words is "seventy-one million, two hundred seventy-nine thousand, one hundred twenty-three".