149168321 has 2 divisors, whose sum is σ = 149168322. Its totient is φ = 149168320.

The previous prime is 149168303. The next prime is 149168323. The reversal of 149168321 is 123861941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108972721 + 40195600 = 10439^2 + 6340^2 .

It is a cyclic number.

It is not a de Polignac number, because 149168321 - 2¹⁰ = 149167297 is a prime.

Together with 149168323, 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 (149168323) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74584160 + 74584161.

It is an arithmetic number, because the mean of its divisors is an integer number (74584161).

Almost surely, 2^149168321 is an apocalyptic number.

It is an amenable number.

149168321 is a deficient number, since it is larger than the sum of its proper divisors (1).

149168321 is an equidigital number, since it uses as much as digits as its factorization.

149168321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10368, while the sum is 35.

The square root of 149168321 is about 12213.4483664524. The cubic root of 149168321 is about 530.3454742949.

The spelling of 149168321 in words is "one hundred forty-nine million, one hundred sixty-eight thousand, three hundred twenty-one".