47821489 has 2 divisors, whose sum is σ = 47821490. Its totient is φ = 47821488.

The previous prime is 47821483. The next prime is 47821511. The reversal of 47821489 is 98412874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36397089 + 11424400 = 6033^2 + 3380^2 .

It is a cyclic number.

It is not a de Polignac number, because 47821489 - 2³ = 47821481 is a prime.

It is not a weakly prime, because it can be changed into another prime (47821481) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23910744 + 23910745.

It is an arithmetic number, because the mean of its divisors is an integer number (23910745).

Almost surely, 2^47821489 is an apocalyptic number.

It is an amenable number.

47821489 is a deficient number, since it is larger than the sum of its proper divisors (1).

47821489 is an equidigital number, since it uses as much as digits as its factorization.

47821489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 43.

The square root of 47821489 is about 6915.3083083837. The cubic root of 47821489 is about 362.9730366735.

The spelling of 47821489 in words is "forty-seven million, eight hundred twenty-one thousand, four hundred eighty-nine".