193081947 has 16 divisors (see below), whose sum is σ = 265109280. Its totient is φ = 124906752.

The previous prime is 193081943. The next prime is 193081949. The reversal of 193081947 is 749180391.

It is a happy number.

It is not a de Polignac number, because 193081947 - 2² = 193081943 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 193081899 and 193081908.

It is not an unprimeable number, because it can be changed into a prime (193081943) 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 in 15 ways as a sum of consecutive naturals, for example, 43273 + ... + 47525.

It is an arithmetic number, because the mean of its divisors is an integer number (16569330).

Almost surely, 2^193081947 is an apocalyptic number.

193081947 is a deficient number, since it is larger than the sum of its proper divisors (72027333).

193081947 is a wasteful number, since it uses less digits than its factorization.

193081947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4702.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 193081947 is about 13895.3930135135. The cubic root of 193081947 is about 577.9814362081.

The spelling of 193081947 in words is "one hundred ninety-three million, eighty-one thousand, nine hundred forty-seven".