71630047 has 4 divisors (see below), whose sum is σ = 71649216. Its totient is φ = 71610880.

The previous prime is 71630033. The next prime is 71630059. The reversal of 71630047 is 74003617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74003617 = 4271 ⋅17327.

It is a cyclic number.

It is not a de Polignac number, because 71630047 - 2²³ = 63241439 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 71629997 and 71630024.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71630147) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1954 + ... + 12127.

It is an arithmetic number, because the mean of its divisors is an integer number (17912304).

Almost surely, 2^71630047 is an apocalyptic number.

71630047 is a deficient number, since it is larger than the sum of its proper divisors (19169).

71630047 is a wasteful number, since it uses less digits than its factorization.

71630047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19168.

The product of its (nonzero) digits is 3528, while the sum is 28.

The square root of 71630047 is about 8463.4536094906. The cubic root of 71630047 is about 415.3030099433.

The spelling of 71630047 in words is "seventy-one million, six hundred thirty thousand, forty-seven".