189307249687 has 2 divisors, whose sum is σ = 189307249688. Its totient is φ = 189307249686.

The previous prime is 189307249643. The next prime is 189307249751. The reversal of 189307249687 is 786942703981.

It is an a-pointer prime, because the next prime (189307249751) can be obtained adding 189307249687 to its sum of digits (64).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 189307249687 - 2¹⁵ = 189307216919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (189307249487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 94653624843 + 94653624844.

It is an arithmetic number, because the mean of its divisors is an integer number (94653624844).

Almost surely, 2^189307249687 is an apocalyptic number.

189307249687 is a deficient number, since it is larger than the sum of its proper divisors (1).

189307249687 is an equidigital number, since it uses as much as digits as its factorization.

189307249687 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36578304, while the sum is 64.

The spelling of 189307249687 in words is "one hundred eighty-nine billion, three hundred seven million, two hundred forty-nine thousand, six hundred eighty-seven".