71939 has 8 divisors (see below), whose sum is σ = 84480. Its totient is φ = 59976.

The previous prime is 71933. The next prime is 71941. The reversal of 71939 is 93917.

71939 = T₃₅ + T₃₆ + ... + T₇₇.

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

It is not a de Polignac number, because 71939 - 2¹² = 67843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71933) 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, 182 + ... + 420.

It is an arithmetic number, because the mean of its divisors is an integer number (10560).

2⁷¹⁹³⁹ is an apocalyptic number.

71939 is a deficient number, since it is larger than the sum of its proper divisors (12541).

71939 is a wasteful number, since it uses less digits than its factorization.

71939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 289.

The product of its digits is 1701, while the sum is 29.

The square root of 71939 is about 268.2144664257. The cubic root of 71939 is about 41.5899245200.

The spelling of 71939 in words is "seventy-one thousand, nine hundred thirty-nine".