47309989 has 2 divisors, whose sum is σ = 47309990. Its totient is φ = 47309988.

The previous prime is 47309971. The next prime is 47310007. The reversal of 47309989 is 98990374.

47309989 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 (47309971) and next prime (47310007).

It can be written as a sum of positive squares in only one way, i.e., 46812964 + 497025 = 6842^2 + 705^2 .

It is a cyclic number.

It is not a de Polignac number, because 47309989 - 2⁹ = 47309477 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47309189) 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, 23654994 + 23654995.

It is an arithmetic number, because the mean of its divisors is an integer number (23654995).

Almost surely, 2^47309989 is an apocalyptic number.

It is an amenable number.

47309989 is a deficient number, since it is larger than the sum of its proper divisors (1).

47309989 is an equidigital number, since it uses as much as digits as its factorization.

47309989 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 489888, while the sum is 49.

The square root of 47309989 is about 6878.2257159823. The cubic root of 47309989 is about 361.6742717743.

The spelling of 47309989 in words is "forty-seven million, three hundred nine thousand, nine hundred eighty-nine".