71679971 has 8 divisors (see below), whose sum is σ = 78257664. Its totient is φ = 65112520.

The previous prime is 71679961. The next prime is 71679991. The reversal of 71679971 is 17997617.

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

It is not a de Polignac number, because 71679971 - 2¹⁴ = 71663587 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71679901) 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, 25586 + ... + 28248.

It is an arithmetic number, because the mean of its divisors is an integer number (9782208).

Almost surely, 2^71679971 is an apocalyptic number.

71679971 is a deficient number, since it is larger than the sum of its proper divisors (6577693).

71679971 is a wasteful number, since it uses less digits than its factorization.

71679971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5121.

The product of its digits is 166698, while the sum is 47.

The square root of 71679971 is about 8466.4024827550. The cubic root of 71679971 is about 415.3994721279.

The spelling of 71679971 in words is "seventy-one million, six hundred seventy-nine thousand, nine hundred seventy-one".