71920047 has 8 divisors (see below), whose sum is σ = 101534256. Its totient is φ = 45126272.

The previous prime is 71920039. The next prime is 71920061. The reversal of 71920047 is 74002917.

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 71920047 - 2³ = 71920039 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71919996 and 71920023.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71920007) 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, 705048 + ... + 705149.

It is an arithmetic number, because the mean of its divisors is an integer number (12691782).

Almost surely, 2^71920047 is an apocalyptic number.

71920047 is a deficient number, since it is larger than the sum of its proper divisors (29614209).

71920047 is a wasteful number, since it uses less digits than its factorization.

71920047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1410217.

The product of its (nonzero) digits is 3528, while the sum is 30.

The square root of 71920047 is about 8480.5687898867. The cubic root of 71920047 is about 415.8627178144.

The spelling of 71920047 in words is "seventy-one million, nine hundred twenty thousand, forty-seven".