47961921 has 16 divisors (see below), whose sum is σ = 74284928. Its totient is φ = 26956800.

The previous prime is 47961889. The next prime is 47961943. The reversal of 47961921 is 12916974.

It is not a de Polignac number, because 47961921 - 2⁵ = 47961889 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 47961921.

It is not an unprimeable number, because it can be changed into a prime (47961961) 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, 17440 + ... + 20001.

It is an arithmetic number, because the mean of its divisors is an integer number (4642808).

Almost surely, 2^47961921 is an apocalyptic number.

It is an amenable number.

47961921 is a deficient number, since it is larger than the sum of its proper divisors (26323007).

47961921 is a wasteful number, since it uses less digits than its factorization.

47961921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37512.

The product of its digits is 27216, while the sum is 39.

The square root of 47961921 is about 6925.4545699181. The cubic root of 47961921 is about 363.3279901766.

The spelling of 47961921 in words is "forty-seven million, nine hundred sixty-one thousand, nine hundred twenty-one".