189665708747 has 2 divisors, whose sum is σ = 189665708748. Its totient is φ = 189665708746.

The previous prime is 189665708707. The next prime is 189665708759. The reversal of 189665708747 is 747807566981.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 189665708747 - 2¹⁰ = 189665707723 is a prime.

It is not a weakly prime, because it can be changed into another prime (189665708707) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94832854373 + 94832854374.

It is an arithmetic number, because the mean of its divisors is an integer number (94832854374).

Almost surely, 2^189665708747 is an apocalyptic number.

189665708747 is a deficient number, since it is larger than the sum of its proper divisors (1).

189665708747 is an equidigital number, since it uses as much as digits as its factorization.

189665708747 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 142248960, while the sum is 68.

The spelling of 189665708747 in words is "one hundred eighty-nine billion, six hundred sixty-five million, seven hundred eight thousand, seven hundred forty-seven".