71944407 has 6 divisors (see below), whose sum is σ = 103919712. Its totient is φ = 47962932.

The previous prime is 71944387. The next prime is 71944409. The reversal of 71944407 is 70444917.

It is not a de Polignac number, because 71944407 - 2¹⁴ = 71928023 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71944409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3996903 + ... + 3996920.

It is an arithmetic number, because the mean of its divisors is an integer number (17319952).

Almost surely, 2^71944407 is an apocalyptic number.

71944407 is a deficient number, since it is larger than the sum of its proper divisors (31975305).

71944407 is a wasteful number, since it uses less digits than its factorization.

71944407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7993829 (or 7993826 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 36.

The square root of 71944407 is about 8482.0048927126. The cubic root of 71944407 is about 415.9096647260.

The spelling of 71944407 in words is "seventy-one million, nine hundred forty-four thousand, four hundred seven".