189769672049 has 2 divisors, whose sum is σ = 189769672050. Its totient is φ = 189769672048.

The previous prime is 189769672031. The next prime is 189769672073. The reversal of 189769672049 is 940276967981.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 177455775025 + 12313897024 = 421255^2 + 110968^2 .

It is a cyclic number.

It is not a de Polignac number, because 189769672049 - 2¹² = 189769667953 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 189769672049.

It is not a weakly prime, because it can be changed into another prime (189769672019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94884836024 + 94884836025.

It is an arithmetic number, because the mean of its divisors is an integer number (94884836025).

Almost surely, 2^189769672049 is an apocalyptic number.

It is an amenable number.

189769672049 is a deficient number, since it is larger than the sum of its proper divisors (1).

189769672049 is an equidigital number, since it uses as much as digits as its factorization.

189769672049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 82301184, while the sum is 68.

The spelling of 189769672049 in words is "one hundred eighty-nine billion, seven hundred sixty-nine million, six hundred seventy-two thousand, forty-nine".