71438387 has 2 divisors, whose sum is σ = 71438388. Its totient is φ = 71438386.

The previous prime is 71438377. The next prime is 71438399. The reversal of 71438387 is 78383417.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71438387 is a prime.

It is equal to p_4197659 and since 71438387 and 4197659 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (71438327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35719193 + 35719194.

It is an arithmetic number, because the mean of its divisors is an integer number (35719194).

Almost surely, 2^71438387 is an apocalyptic number.

71438387 is a deficient number, since it is larger than the sum of its proper divisors (1).

71438387 is an equidigital number, since it uses as much as digits as its factorization.

71438387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 112896, while the sum is 41.

The square root of 71438387 is about 8452.1232243739. The cubic root of 71438387 is about 414.9322713297.

The spelling of 71438387 in words is "seventy-one million, four hundred thirty-eight thousand, three hundred eighty-seven".