154666229 has 2 divisors, whose sum is σ = 154666230. Its totient is φ = 154666228.

The previous prime is 154666219. The next prime is 154666231. The reversal of 154666229 is 922666451.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 80964004 + 73702225 = 8998^2 + 8585^2 .

It is a cyclic number.

It is not a de Polignac number, because 154666229 - 2²⁴ = 137889013 is a prime.

Together with 154666231, 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 (154666219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 77333114 + 77333115.

It is an arithmetic number, because the mean of its divisors is an integer number (77333115).

Almost surely, 2^154666229 is an apocalyptic number.

It is an amenable number.

154666229 is a deficient number, since it is larger than the sum of its proper divisors (1).

154666229 is an equidigital number, since it uses as much as digits as its factorization.

154666229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 155520, while the sum is 41.

The square root of 154666229 is about 12436.4878080590. The cubic root of 154666229 is about 536.7826857603.

The spelling of 154666229 in words is "one hundred fifty-four million, six hundred sixty-six thousand, two hundred twenty-nine".