47216729 has 16 divisors (see below), whose sum is σ = 57340800. Its totient is φ = 37977984.

The previous prime is 47216713. The next prime is 47216731. The reversal of 47216729 is 92761274.

It is a cyclic number.

It is not a de Polignac number, because 47216729 - 2⁴ = 47216713 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 47216692 and 47216701.

It is not an unprimeable number, because it can be changed into a prime (47216749) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12869 + ... + 16125.

It is an arithmetic number, because the mean of its divisors is an integer number (3583800).

Almost surely, 2^47216729 is an apocalyptic number.

It is an amenable number.

47216729 is a deficient number, since it is larger than the sum of its proper divisors (10124071).

47216729 is a wasteful number, since it uses less digits than its factorization.

47216729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3392.

The product of its digits is 42336, while the sum is 38.

The square root of 47216729 is about 6871.4430071128. The cubic root of 47216729 is about 361.4364648411.

The spelling of 47216729 in words is "forty-seven million, two hundred sixteen thousand, seven hundred twenty-nine".