47842189 has 2 divisors, whose sum is σ = 47842190. Its totient is φ = 47842188.

The previous prime is 47842183. The next prime is 47842213. The reversal of 47842189 is 98124874.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47817225 + 24964 = 6915^2 + 158^2 .

It is a cyclic number.

It is not a de Polignac number, because 47842189 - 2⁷ = 47842061 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (47842183) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23921094 + 23921095.

It is an arithmetic number, because the mean of its divisors is an integer number (23921095).

Almost surely, 2^47842189 is an apocalyptic number.

It is an amenable number.

47842189 is a deficient number, since it is larger than the sum of its proper divisors (1).

47842189 is an equidigital number, since it uses as much as digits as its factorization.

47842189 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 43.

The square root of 47842189 is about 6916.8048259294. The cubic root of 47842189 is about 363.0254012637.

It can be divided in two parts, 4784 and 2189, that multiplied together give a triangular number (10472176 = T₄₅₇₆).

The spelling of 47842189 in words is "forty-seven million, eight hundred forty-two thousand, one hundred eighty-nine".