189926447 has 2 divisors, whose sum is σ = 189926448. Its totient is φ = 189926446.

The previous prime is 189926411. The next prime is 189926461. The reversal of 189926447 is 744629981.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189926447 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 189926395 and 189926404.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189926467) 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, 94963223 + 94963224.

It is an arithmetic number, because the mean of its divisors is an integer number (94963224).

Almost surely, 2^189926447 is an apocalyptic number.

189926447 is a deficient number, since it is larger than the sum of its proper divisors (1).

189926447 is an equidigital number, since it uses as much as digits as its factorization.

189926447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 870912, while the sum is 50.

The square root of 189926447 is about 13781.3804460947. The cubic root of 189926447 is about 574.8155143501.

The spelling of 189926447 in words is "one hundred eighty-nine million, nine hundred twenty-six thousand, four hundred forty-seven".