189944047 has 2 divisors, whose sum is σ = 189944048. Its totient is φ = 189944046.

The previous prime is 189944033. The next prime is 189944093. The reversal of 189944047 is 740449981.

It is an a-pointer prime, because the next prime (189944093) can be obtained adding 189944047 to its sum of digits (46).

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189944047 is a prime.

It is a super-3 number, since 3×189944047³ (a number of 26 digits) contains 333 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 189943988 and 189944006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189944647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94972023 + 94972024.

It is an arithmetic number, because the mean of its divisors is an integer number (94972024).

Almost surely, 2^189944047 is an apocalyptic number.

189944047 is a deficient number, since it is larger than the sum of its proper divisors (1).

189944047 is an equidigital number, since it uses as much as digits as its factorization.

189944047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 290304, while the sum is 46.

The square root of 189944047 is about 13782.0189740110. The cubic root of 189944047 is about 574.8332693648.

The spelling of 189944047 in words is "one hundred eighty-nine million, nine hundred forty-four thousand, forty-seven".