189765797747 has 2 divisors, whose sum is σ = 189765797748. Its totient is φ = 189765797746.

The previous prime is 189765797743. The next prime is 189765797777. The reversal of 189765797747 is 747797567981.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189765797747 - 2² = 189765797743 is a prime.

It is a super-2 number, since 2×189765797747² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (189765797743) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94882898873 + 94882898874.

It is an arithmetic number, because the mean of its divisors is an integer number (94882898874).

Almost surely, 2^189765797747 is an apocalyptic number.

189765797747 is a deficient number, since it is larger than the sum of its proper divisors (1).

189765797747 is an equidigital number, since it uses as much as digits as its factorization.

189765797747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1306912320, while the sum is 77.

The spelling of 189765797747 in words is "one hundred eighty-nine billion, seven hundred sixty-five million, seven hundred ninety-seven thousand, seven hundred forty-seven".