71438923 has 2 divisors, whose sum is σ = 71438924. Its totient is φ = 71438922.

The previous prime is 71438921. The next prime is 71438929. The reversal of 71438923 is 32983417.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 71438923 - 2¹ = 71438921 is a prime.

Together with 71438921, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (71438921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35719461 + 35719462.

It is an arithmetic number, because the mean of its divisors is an integer number (35719462).

Almost surely, 2^71438923 is an apocalyptic number.

71438923 is a deficient number, since it is larger than the sum of its proper divisors (1).

71438923 is an equidigital number, since it uses as much as digits as its factorization.

71438923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36288, while the sum is 37.

The square root of 71438923 is about 8452.1549323235. The cubic root of 71438923 is about 414.9333090684.

It can be divided in two parts, 71438 and 923, that added together give a square (72361 = 269²).

The spelling of 71438923 in words is "seventy-one million, four hundred thirty-eight thousand, nine hundred twenty-three".