149948321 has 2 divisors, whose sum is σ = 149948322. Its totient is φ = 149948320.

The previous prime is 149948303. The next prime is 149948329. The reversal of 149948321 is 123849941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 142468096 + 7480225 = 11936^2 + 2735^2 .

It is an emirp because it is prime and its reverse (123849941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149948321 - 2⁶ = 149948257 is a prime.

It is not a weakly prime, because it can be changed into another prime (149948329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74974160 + 74974161.

It is an arithmetic number, because the mean of its divisors is an integer number (74974161).

Almost surely, 2^149948321 is an apocalyptic number.

It is an amenable number.

149948321 is a deficient number, since it is larger than the sum of its proper divisors (1).

149948321 is an equidigital number, since it uses as much as digits as its factorization.

149948321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 41.

The square root of 149948321 is about 12245.3387458249. The cubic root of 149948321 is about 531.2682585466.

The spelling of 149948321 in words is "one hundred forty-nine million, nine hundred forty-eight thousand, three hundred twenty-one".