47409421 has 2 divisors, whose sum is σ = 47409422. Its totient is φ = 47409420.

The previous prime is 47409409. The next prime is 47409433. The reversal of 47409421 is 12490474.

47409421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (47409409) and next prime (47409433).

It can be written as a sum of positive squares in only one way, i.e., 47196900 + 212521 = 6870^2 + 461^2 .

It is a cyclic number.

It is not a de Polignac number, because 47409421 - 2⁹ = 47408909 is a prime.

It is a Chen prime.

It is equal to p_2854822 and since 47409421 and 2854822 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47409121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23704710 + 23704711.

It is an arithmetic number, because the mean of its divisors is an integer number (23704711).

Almost surely, 2^47409421 is an apocalyptic number.

It is an amenable number.

47409421 is a deficient number, since it is larger than the sum of its proper divisors (1).

47409421 is an equidigital number, since it uses as much as digits as its factorization.

47409421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 47409421 is about 6885.4499489866. The cubic root of 47409421 is about 361.9274729298.

Adding to 47409421 its reverse (12490474), we get a palindrome (59899895).

It can be divided in two parts, 4740 and 9421, that added together give a square (14161 = 119²).

The spelling of 47409421 in words is "forty-seven million, four hundred nine thousand, four hundred twenty-one".