47449421 has 2 divisors, whose sum is σ = 47449422. Its totient is φ = 47449420.

The previous prime is 47449373. The next prime is 47449427. The reversal of 47449421 is 12494474.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 28622500 + 18826921 = 5350^2 + 4339^2 .

It is a cyclic number.

It is not a de Polignac number, because 47449421 - 2¹⁰ = 47448397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47449427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a good prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23724710 + 23724711.

It is an arithmetic number, because the mean of its divisors is an integer number (23724711).

Almost surely, 2^47449421 is an apocalyptic number.

It is an amenable number.

47449421 is a deficient number, since it is larger than the sum of its proper divisors (1).

47449421 is an equidigital number, since it uses as much as digits as its factorization.

47449421 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 32256, while the sum is 35.

The square root of 47449421 is about 6888.3540123893. The cubic root of 47449421 is about 362.0292320950.

The spelling of 47449421 in words is "forty-seven million, four hundred forty-nine thousand, four hundred twenty-one".