71878459 has 2 divisors, whose sum is σ = 71878460. Its totient is φ = 71878458.

The previous prime is 71878451. The next prime is 71878489. The reversal of 71878459 is 95487817.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71878459 - 2³ = 71878451 is a prime.

It is not a weakly prime, because it can be changed into another prime (71878451) 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, 35939229 + 35939230.

It is an arithmetic number, because the mean of its divisors is an integer number (35939230).

Almost surely, 2^71878459 is an apocalyptic number.

71878459 is a deficient number, since it is larger than the sum of its proper divisors (1).

71878459 is an equidigital number, since it uses as much as digits as its factorization.

71878459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 564480, while the sum is 49.

The square root of 71878459 is about 8478.1164771428. The cubic root of 71878459 is about 415.7825443713.

The spelling of 71878459 in words is "seventy-one million, eight hundred seventy-eight thousand, four hundred fifty-nine".