47721061 has 2 divisors, whose sum is σ = 47721062. Its totient is φ = 47721060.

The previous prime is 47721043. The next prime is 47721071. The reversal of 47721061 is 16012774.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31472100 + 16248961 = 5610^2 + 4031^2 .

It is a cyclic number.

It is not a de Polignac number, because 47721061 - 2²⁵ = 14166629 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47721031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23860530 + 23860531.

It is an arithmetic number, because the mean of its divisors is an integer number (23860531).

Almost surely, 2^47721061 is an apocalyptic number.

It is an amenable number.

47721061 is a deficient number, since it is larger than the sum of its proper divisors (1).

47721061 is an equidigital number, since it uses as much as digits as its factorization.

47721061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 47721061 is about 6908.0432106350. The cubic root of 47721061 is about 362.7187702040.

The spelling of 47721061 in words is "forty-seven million, seven hundred twenty-one thousand, sixty-one".