999928470187 has 2 divisors, whose sum is σ = 999928470188. Its totient is φ = 999928470186.

The previous prime is 999928470143. The next prime is 999928470287. The reversal of 999928470187 is 781074829999.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 999928470187 - 2¹⁹ = 999927945899 is a prime.

It is not a weakly prime, because it can be changed into another prime (999928470287) 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, 499964235093 + 499964235094.

It is an arithmetic number, because the mean of its divisors is an integer number (499964235094).

Almost surely, 2^999928470187 is an apocalyptic number.

999928470187 is a deficient number, since it is larger than the sum of its proper divisors (1).

999928470187 is an equidigital number, since it uses as much as digits as its factorization.

999928470187 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 164602368, while the sum is 73.

The spelling of 999928470187 in words is "nine hundred ninety-nine billion, nine hundred twenty-eight million, four hundred seventy thousand, one hundred eighty-seven".