71272779 has 8 divisors (see below), whose sum is σ = 95449920. Its totient is φ = 47305416.

The previous prime is 71272769. The next prime is 71272793. The reversal of 71272779 is 97727217.

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

It is not a de Polignac number, because 71272779 - 2⁴ = 71272763 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 71272779.

It is not an unprimeable number, because it can be changed into a prime (71272709) 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, 51649 + ... + 53010.

It is an arithmetic number, because the mean of its divisors is an integer number (11931240).

Almost surely, 2^71272779 is an apocalyptic number.

71272779 is a deficient number, since it is larger than the sum of its proper divisors (24177141).

71272779 is a wasteful number, since it uses less digits than its factorization.

71272779 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104889.

The product of its digits is 86436, while the sum is 42.

The square root of 71272779 is about 8442.3207117475. The cubic root of 71272779 is about 414.6113921589.

The spelling of 71272779 in words is "seventy-one million, two hundred seventy-two thousand, seven hundred seventy-nine".