189548778347 has 2 divisors, whose sum is σ = 189548778348. Its totient is φ = 189548778346.

The previous prime is 189548778323. The next prime is 189548778389. The reversal of 189548778347 is 743877845981.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189548778347 - 2⁶ = 189548778283 is a prime.

It is not a weakly prime, because it can be changed into another prime (189548778247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94774389173 + 94774389174.

It is an arithmetic number, because the mean of its divisors is an integer number (94774389174).

Almost surely, 2^189548778347 is an apocalyptic number.

189548778347 is a deficient number, since it is larger than the sum of its proper divisors (1).

189548778347 is an equidigital number, since it uses as much as digits as its factorization.

189548778347 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 379330560, while the sum is 71.

The spelling of 189548778347 in words is "one hundred eighty-nine billion, five hundred forty-eight million, seven hundred seventy-eight thousand, three hundred forty-seven".