47832121 has 2 divisors, whose sum is σ = 47832122. Its totient is φ = 47832120.

The previous prime is 47832097. The next prime is 47832131. The reversal of 47832121 is 12123874.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45697600 + 2134521 = 6760^2 + 1461^2 .

It is a cyclic number.

It is not a de Polignac number, because 47832121 - 2¹⁹ = 47307833 is a prime.

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

It is a self number, because there is not a number n which added to its sum of digits gives 47832121.

It is not a weakly prime, because it can be changed into another prime (47832131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23916060 + 23916061.

It is an arithmetic number, because the mean of its divisors is an integer number (23916061).

Almost surely, 2^47832121 is an apocalyptic number.

It is an amenable number.

47832121 is a deficient number, since it is larger than the sum of its proper divisors (1).

47832121 is an equidigital number, since it uses as much as digits as its factorization.

47832121 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2688, while the sum is 28.

The square root of 47832121 is about 6916.0769949445. The cubic root of 47832121 is about 362.9999342283. Note that the first 4 decimals are identical.

Adding to 47832121 its reverse (12123874), we get a palindrome (59955995).

The spelling of 47832121 in words is "forty-seven million, eight hundred thirty-two thousand, one hundred twenty-one".