47729121 has 16 divisors (see below), whose sum is σ = 73079040. Its totient is φ = 27403920.

The previous prime is 47729113. The next prime is 47729131. The reversal of 47729121 is 12192774.

It is not a de Polignac number, because 47729121 - 2³ = 47729113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47729131) 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, 37435 + ... + 38688.

It is an arithmetic number, because the mean of its divisors is an integer number (4567440).

Almost surely, 2^47729121 is an apocalyptic number.

It is an amenable number.

47729121 is a deficient number, since it is larger than the sum of its proper divisors (25349919).

47729121 is a wasteful number, since it uses less digits than its factorization.

47729121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76156.

The product of its digits is 7056, while the sum is 33.

The square root of 47729121 is about 6908.6265639416. The cubic root of 47729121 is about 362.7391899002.

The spelling of 47729121 in words is "forty-seven million, seven hundred twenty-nine thousand, one hundred twenty-one".