149866219 has 2 divisors, whose sum is σ = 149866220. Its totient is φ = 149866218.

The previous prime is 149866217. The next prime is 149866247. The reversal of 149866219 is 912668941.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149866219 - 2¹ = 149866217 is a prime.

It is a super-2 number, since 2×149866219² = 44919767194711922, which contains 22 as substring.

Together with 149866217, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (149866217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74933109 + 74933110.

It is an arithmetic number, because the mean of its divisors is an integer number (74933110).

Almost surely, 2^149866219 is an apocalyptic number.

149866219 is a deficient number, since it is larger than the sum of its proper divisors (1).

149866219 is an equidigital number, since it uses as much as digits as its factorization.

149866219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 46.

The square root of 149866219 is about 12241.9859091571. The cubic root of 149866219 is about 531.1712781347.

The spelling of 149866219 in words is "one hundred forty-nine million, eight hundred sixty-six thousand, two hundred nineteen".