47320421 has 2 divisors, whose sum is σ = 47320422. Its totient is φ = 47320420.

The previous prime is 47320417. The next prime is 47320433. The reversal of 47320421 is 12402374.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27196225 + 20124196 = 5215^2 + 4486^2 .

It is a cyclic number.

It is not a de Polignac number, because 47320421 - 2² = 47320417 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47320411) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23660210 + 23660211.

It is an arithmetic number, because the mean of its divisors is an integer number (23660211).

Almost surely, 2^47320421 is an apocalyptic number.

It is an amenable number.

47320421 is a deficient number, since it is larger than the sum of its proper divisors (1).

47320421 is an equidigital number, since it uses as much as digits as its factorization.

47320421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 47320421 is about 6878.9840092851. The cubic root of 47320421 is about 361.7008532553.

Adding to 47320421 its reverse (12402374), we get a palindrome (59722795).

The spelling of 47320421 in words is "forty-seven million, three hundred twenty thousand, four hundred twenty-one".