47672121 has 32 divisors (see below), whose sum is σ = 77040640. Its totient is φ = 25614144.

The previous prime is 47672111. The next prime is 47672137. The reversal of 47672121 is 12127674.

It is not a de Polignac number, because 47672121 - 2⁵ = 47672089 is a prime.

It is a super-2 number, since 2×47672121² = 4545262241277282, which contains 22 as substring.

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

It is the 6905-th Hogben number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (47672111) by changing a digit.

It is a nontrivial repunit in base 6904.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64671 + ... + 65403.

It is an arithmetic number, because the mean of its divisors is an integer number (2407520).

Almost surely, 2^47672121 is an apocalyptic number.

It is an amenable number.

47672121 is a deficient number, since it is larger than the sum of its proper divisors (29368519).

47672121 is a wasteful number, since it uses less digits than its factorization.

47672121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 925.

The product of its digits is 4704, while the sum is 30.

The square root of 47672121 is about 6904.5000543124. The cubic root of 47672121 is about 362.5947332274.

Adding to 47672121 its reverse (12127674), we get a palindrome (59799795).

The spelling of 47672121 in words is "forty-seven million, six hundred seventy-two thousand, one hundred twenty-one".