149438213 has 2 divisors, whose sum is σ = 149438214. Its totient is φ = 149438212.

The previous prime is 149438203. The next prime is 149438231. The reversal of 149438213 is 312834941.

Together with next prime (149438231) 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., 110712484 + 38725729 = 10522^2 + 6223^2 .

It is a cyclic number.

It is not a de Polignac number, because 149438213 - 2²⁶ = 82329349 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 (149438203) 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, 74719106 + 74719107.

It is an arithmetic number, because the mean of its divisors is an integer number (74719107).

Almost surely, 2^149438213 is an apocalyptic number.

It is an amenable number.

149438213 is a deficient number, since it is larger than the sum of its proper divisors (1).

149438213 is an equidigital number, since it uses as much as digits as its factorization.

149438213 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 35.

The square root of 149438213 is about 12224.4923411976. The cubic root of 149438213 is about 530.6651350213.

The spelling of 149438213 in words is "one hundred forty-nine million, four hundred thirty-eight thousand, two hundred thirteen".