189878830837 has 2 divisors, whose sum is σ = 189878830838. Its totient is φ = 189878830836.

The previous prime is 189878830807. The next prime is 189878830861. The reversal of 189878830837 is 738038878981.

189878830837 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140719515876 + 49159314961 = 375126^2 + 221719^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-189878830837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189878830807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94939415418 + 94939415419.

It is an arithmetic number, because the mean of its divisors is an integer number (94939415419).

Almost surely, 2^189878830837 is an apocalyptic number.

It is an amenable number.

189878830837 is a deficient number, since it is larger than the sum of its proper divisors (1).

189878830837 is an equidigital number, since it uses as much as digits as its factorization.

189878830837 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 130056192, while the sum is 70.

The spelling of 189878830837 in words is "one hundred eighty-nine billion, eight hundred seventy-eight million, eight hundred thirty thousand, eight hundred thirty-seven".