71616047 has 4 divisors (see below), whose sum is σ = 71742480. Its totient is φ = 71489616.

The previous prime is 71616037. The next prime is 71616049. The reversal of 71616047 is 74061617.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71616047 - 2⁴ = 71616031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71616049) 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, 62363 + ... + 63500.

It is an arithmetic number, because the mean of its divisors is an integer number (17935620).

Almost surely, 2^71616047 is an apocalyptic number.

71616047 is a deficient number, since it is larger than the sum of its proper divisors (126433).

71616047 is a wasteful number, since it uses less digits than its factorization.

71616047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126432.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 71616047 is about 8462.6264835452. The cubic root of 71616047 is about 415.2759513684.

The spelling of 71616047 in words is "seventy-one million, six hundred sixteen thousand, forty-seven".