47321729 has 8 divisors (see below), whose sum is σ = 58242240. Its totient is φ = 37441296.

The previous prime is 47321699. The next prime is 47321731. The reversal of 47321729 is 92712374.

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 47321729 - 2⁸ = 47321473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (47321929) 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, 259919 + ... + 260100.

It is an arithmetic number, because the mean of its divisors is an integer number (7280280).

Almost surely, 2^47321729 is an apocalyptic number.

It is an amenable number.

47321729 is a deficient number, since it is larger than the sum of its proper divisors (10920511).

47321729 is a wasteful number, since it uses less digits than its factorization.

47321729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 520039.

The product of its digits is 21168, while the sum is 35.

The square root of 47321729 is about 6879.0790808073. The cubic root of 47321729 is about 361.7041858571.

The spelling of 47321729 in words is "forty-seven million, three hundred twenty-one thousand, seven hundred twenty-nine".