47312621 has 2 divisors, whose sum is σ = 47312622. Its totient is φ = 47312620.

The previous prime is 47312609. The next prime is 47312651. The reversal of 47312621 is 12621374.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35271721 + 12040900 = 5939^2 + 3470^2 .

It is a cyclic number.

It is not a de Polignac number, because 47312621 - 2⁶ = 47312557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47312651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23656310 + 23656311.

It is an arithmetic number, because the mean of its divisors is an integer number (23656311).

Almost surely, 2^47312621 is an apocalyptic number.

It is an amenable number.

47312621 is a deficient number, since it is larger than the sum of its proper divisors (1).

47312621 is an equidigital number, since it uses as much as digits as its factorization.

47312621 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2016, while the sum is 26.

The square root of 47312621 is about 6878.4170417328. The cubic root of 47312621 is about 361.6809786668.

Adding to 47312621 its reverse (12621374), we get a palindrome (59933995).

The spelling of 47312621 in words is "forty-seven million, three hundred twelve thousand, six hundred twenty-one".