47398820989 has 4 divisors (see below), whose sum is σ = 51044884156. Its totient is φ = 43752757824.

The previous prime is 47398820977. The next prime is 47398820999. The reversal of 47398820989 is 98902889374.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5941788889 + 41457032100 = 77083^2 + 203610^2 .

It is a cyclic number.

It is not a de Polignac number, because 47398820989 - 2¹¹ = 47398818941 is a prime.

It is a super-2 number, since 2×47398820989² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47398820999) 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 in 3 ways as a sum of consecutive naturals, for example, 1823031564 + ... + 1823031589.

It is an arithmetic number, because the mean of its divisors is an integer number (12761221039).

Almost surely, 2^47398820989 is an apocalyptic number.

It is an amenable number.

47398820989 is a deficient number, since it is larger than the sum of its proper divisors (3646063167).

47398820989 is a wasteful number, since it uses less digits than its factorization.

47398820989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3646063166.

The product of its (nonzero) digits is 62705664, while the sum is 67.

The spelling of 47398820989 in words is "forty-seven billion, three hundred ninety-eight million, eight hundred twenty thousand, nine hundred eighty-nine".