71438963 has 2 divisors, whose sum is σ = 71438964. Its totient is φ = 71438962.

The previous prime is 71438957. The next prime is 71438987. The reversal of 71438963 is 36983417.

It is a weak prime.

It is an emirp because it is prime and its reverse (36983417) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71438963 - 2¹⁰ = 71437939 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71438963.

It is not a weakly prime, because it can be changed into another prime (71438923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35719481 + 35719482.

It is an arithmetic number, because the mean of its divisors is an integer number (35719482).

Almost surely, 2^71438963 is an apocalyptic number.

71438963 is a deficient number, since it is larger than the sum of its proper divisors (1).

71438963 is an equidigital number, since it uses as much as digits as its factorization.

71438963 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The square root of 71438963 is about 8452.1572985836. The cubic root of 71438963 is about 414.9333865114.

The spelling of 71438963 in words is "seventy-one million, four hundred thirty-eight thousand, nine hundred sixty-three".