71381279 has 2 divisors, whose sum is σ = 71381280. Its totient is φ = 71381278.

The previous prime is 71381273. The next prime is 71381329. The reversal of 71381279 is 97218317.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71381279 - 2¹² = 71377183 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71381273) 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, 35690639 + 35690640.

It is an arithmetic number, because the mean of its divisors is an integer number (35690640).

Almost surely, 2^71381279 is an apocalyptic number.

71381279 is a deficient number, since it is larger than the sum of its proper divisors (1).

71381279 is an equidigital number, since it uses as much as digits as its factorization.

71381279 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 21168, while the sum is 38.

The square root of 71381279 is about 8448.7442262149. The cubic root of 71381279 is about 414.8216759381.

The spelling of 71381279 in words is "seventy-one million, three hundred eighty-one thousand, two hundred seventy-nine".