71424139 has 2 divisors, whose sum is σ = 71424140. Its totient is φ = 71424138.

The previous prime is 71424109. The next prime is 71424151. The reversal of 71424139 is 93142417.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71424139 - 2¹⁷ = 71293067 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71424139.

It is not a weakly prime, because it can be changed into another prime (71424109) 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, 35712069 + 35712070.

It is an arithmetic number, because the mean of its divisors is an integer number (35712070).

Almost surely, 2^71424139 is an apocalyptic number.

71424139 is a deficient number, since it is larger than the sum of its proper divisors (1).

71424139 is an equidigital number, since it uses as much as digits as its factorization.

71424139 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6048, while the sum is 31.

The square root of 71424139 is about 8451.2803172064. The cubic root of 71424139 is about 414.9046841630.

The spelling of 71424139 in words is "seventy-one million, four hundred twenty-four thousand, one hundred thirty-nine".