71438377 has 2 divisors, whose sum is σ = 71438378. Its totient is φ = 71438376.

The previous prime is 71438327. The next prime is 71438387. The reversal of 71438377 is 77383417.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49056016 + 22382361 = 7004^2 + 4731^2 .

It is a cyclic number.

It is not a de Polignac number, because 71438377 - 2⁷ = 71438249 is a prime.

It is equal to p_4197658 and since 71438377 and 4197658 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 pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35719188 + 35719189.

It is an arithmetic number, because the mean of its divisors is an integer number (35719189).

Almost surely, 2^71438377 is an apocalyptic number.

It is an amenable number.

71438377 is a deficient number, since it is larger than the sum of its proper divisors (1).

71438377 is an equidigital number, since it uses as much as digits as its factorization.

71438377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 98784, while the sum is 40.

The square root of 71438377 is about 8452.1226328065. The cubic root of 71438377 is about 414.9322519689.

The spelling of 71438377 in words is "seventy-one million, four hundred thirty-eight thousand, three hundred seventy-seven".