71373139 has 8 divisors (see below), whose sum is σ = 76548240. Its totient is φ = 66339936.

The previous prime is 71373131. The next prime is 71373143. The reversal of 71373139 is 93137317.

It is a happy number.

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 71373139 - 2³ = 71373131 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71373131) 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, 34432 + ... + 36445.

It is an arithmetic number, because the mean of its divisors is an integer number (9568530).

Almost surely, 2^71373139 is an apocalyptic number.

71373139 is a deficient number, since it is larger than the sum of its proper divisors (5175101).

71373139 is a wasteful number, since it uses less digits than its factorization.

71373139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70949.

The product of its digits is 11907, while the sum is 34.

The square root of 71373139 is about 8448.2624840851. The cubic root of 71373139 is about 414.8059072060.

The spelling of 71373139 in words is "seventy-one million, three hundred seventy-three thousand, one hundred thirty-nine".