71419391 has 2 divisors, whose sum is σ = 71419392. Its totient is φ = 71419390.

The previous prime is 71419357. The next prime is 71419409. The reversal of 71419391 is 19391417.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (19391417) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71419391 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71419351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35709695 + 35709696.

It is an arithmetic number, because the mean of its divisors is an integer number (35709696).

Almost surely, 2^71419391 is an apocalyptic number.

71419391 is a deficient number, since it is larger than the sum of its proper divisors (1).

71419391 is an equidigital number, since it uses as much as digits as its factorization.

71419391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 6804, while the sum is 35.

The square root of 71419391 is about 8450.9994083540. Note that the first 3 decimals coincide. The cubic root of 71419391 is about 414.8954902073.

The spelling of 71419391 in words is "seventy-one million, four hundred nineteen thousand, three hundred ninety-one".