71979085 has 8 divisors (see below), whose sum is σ = 87791256. Its totient is φ = 56639040.

The previous prime is 71979077. The next prime is 71979107. The reversal of 71979085 is 58097917.

It can be written as a sum of positive squares in 4 ways, for example, as 9205156 + 62773929 = 3034^2 + 7923^2 .

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

It is not a de Polignac number, because 71979085 - 2³ = 71979077 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 117694 + ... + 118303.

It is an arithmetic number, because the mean of its divisors is an integer number (10973907).

Almost surely, 2^71979085 is an apocalyptic number.

It is an amenable number.

71979085 is a deficient number, since it is larger than the sum of its proper divisors (15812171).

71979085 is a wasteful number, since it uses less digits than its factorization.

71979085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 236063.

The product of its (nonzero) digits is 158760, while the sum is 46.

The square root of 71979085 is about 8484.0488565307. The cubic root of 71979085 is about 415.9764783452.

The spelling of 71979085 in words is "seventy-one million, nine hundred seventy-nine thousand, eighty-five".