71946139 has 8 divisors (see below), whose sum is σ = 75163392. Its totient is φ = 68736360.

The previous prime is 71946137. The next prime is 71946163. The reversal of 71946139 is 93164917.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 71946139 - 2¹ = 71946137 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71946137) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28482 + ... + 30904.

It is an arithmetic number, because the mean of its divisors is an integer number (9395424).

Almost surely, 2^71946139 is an apocalyptic number.

71946139 is a deficient number, since it is larger than the sum of its proper divisors (3217253).

71946139 is a wasteful number, since it uses less digits than its factorization.

71946139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3737.

The product of its digits is 40824, while the sum is 40.

The square root of 71946139 is about 8482.1069906009. The cubic root of 71946139 is about 415.9130022556.

The spelling of 71946139 in words is "seventy-one million, nine hundred forty-six thousand, one hundred thirty-nine".