189931193653 has 2 divisors, whose sum is σ = 189931193654. Its totient is φ = 189931193652.

The previous prime is 189931193651. The next prime is 189931193677. The reversal of 189931193653 is 356391139981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 116651620849 + 73279572804 = 341543^2 + 270702^2 .

It is a cyclic number.

It is not a de Polignac number, because 189931193653 - 2¹ = 189931193651 is a prime.

Together with 189931193651, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189931193651) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94965596826 + 94965596827.

It is an arithmetic number, because the mean of its divisors is an integer number (94965596827).

Almost surely, 2^189931193653 is an apocalyptic number.

It is an amenable number.

189931193653 is a deficient number, since it is larger than the sum of its proper divisors (1).

189931193653 is an equidigital number, since it uses as much as digits as its factorization.

189931193653 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4723920, while the sum is 58.

The spelling of 189931193653 in words is "one hundred eighty-nine billion, nine hundred thirty-one million, one hundred ninety-three thousand, six hundred fifty-three".