147666019 has 2 divisors, whose sum is σ = 147666020. Its totient is φ = 147666018.

The previous prime is 147666017. The next prime is 147666031. The reversal of 147666019 is 910666741.

It is a weak prime.

It is an emirp because it is prime and its reverse (910666741) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 147666019 - 2¹ = 147666017 is a prime.

It is a super-2 number, since 2×147666019² = 43610506334616722, which contains 22 as substring.

Together with 147666017, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (147666017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 73833009 + 73833010.

It is an arithmetic number, because the mean of its divisors is an integer number (73833010).

Almost surely, 2^147666019 is an apocalyptic number.

147666019 is a deficient number, since it is larger than the sum of its proper divisors (1).

147666019 is an equidigital number, since it uses as much as digits as its factorization.

147666019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 147666019 is about 12151.7907733799. The cubic root of 147666019 is about 528.5590609545.

The spelling of 147666019 in words is "one hundred forty-seven million, six hundred sixty-six thousand, nineteen".