149923229 has 2 divisors, whose sum is σ = 149923230. Its totient is φ = 149923228.

The previous prime is 149923201. The next prime is 149923231. The reversal of 149923229 is 922329941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141657604 + 8265625 = 11902^2 + 2875^2 .

It is a cyclic number.

It is not a de Polignac number, because 149923229 - 2⁸ = 149922973 is a prime.

Together with 149923231, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149922229) 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, 74961614 + 74961615.

It is an arithmetic number, because the mean of its divisors is an integer number (74961615).

Almost surely, 2^149923229 is an apocalyptic number.

It is an amenable number.

149923229 is a deficient number, since it is larger than the sum of its proper divisors (1).

149923229 is an equidigital number, since it uses as much as digits as its factorization.

149923229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 69984, while the sum is 41.

The square root of 149923229 is about 12244.3141498411. The cubic root of 149923229 is about 531.2386231658.

The spelling of 149923229 in words is "one hundred forty-nine million, nine hundred twenty-three thousand, two hundred twenty-nine".