47475809989 has 2 divisors, whose sum is σ = 47475809990. Its totient is φ = 47475809988.

The previous prime is 47475809959. The next prime is 47475810023. The reversal of 47475809989 is 98990857474.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37444185025 + 10031624964 = 193505^2 + 100158^2 .

It is a cyclic number.

It is not a de Polignac number, because 47475809989 - 2⁵ = 47475809957 is a prime.

It is a super-2 number, since 2×47475809989² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47475809959) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23737904994 + 23737904995.

It is an arithmetic number, because the mean of its divisors is an integer number (23737904995).

Almost surely, 2^47475809989 is an apocalyptic number.

It is an amenable number.

47475809989 is a deficient number, since it is larger than the sum of its proper divisors (1).

47475809989 is an equidigital number, since it uses as much as digits as its factorization.

47475809989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 182891520, while the sum is 70.

The spelling of 47475809989 in words is "forty-seven billion, four hundred seventy-five million, eight hundred nine thousand, nine hundred eighty-nine".