149942213 has 2 divisors, whose sum is σ = 149942214. Its totient is φ = 149942212.

The previous prime is 149942201. The next prime is 149942231. The reversal of 149942213 is 312249941.

Together with next prime (149942231) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 132319009 + 17623204 = 11503^2 + 4198^2 .

It is an emirp because it is prime and its reverse (312249941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149942213 - 2⁴ = 149942197 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149942713) 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, 74971106 + 74971107.

It is an arithmetic number, because the mean of its divisors is an integer number (74971107).

Almost surely, 2^149942213 is an apocalyptic number.

It is an amenable number.

149942213 is a deficient number, since it is larger than the sum of its proper divisors (1).

149942213 is an equidigital number, since it uses as much as digits as its factorization.

149942213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15552, while the sum is 35.

The square root of 149942213 is about 12245.0893422629. The cubic root of 149942213 is about 531.2610448823.

The spelling of 149942213 in words is "one hundred forty-nine million, nine hundred forty-two thousand, two hundred thirteen".