144561667 has 4 divisors (see below), whose sum is σ = 144955936. Its totient is φ = 144167400.

The previous prime is 144561629. The next prime is 144561689. The reversal of 144561667 is 766165441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 766165441 = 73 ⋅10495417.

It is a cyclic number.

It is not a de Polignac number, because 144561667 - 2⁷ = 144561539 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144361667) 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 in 3 ways as a sum of consecutive naturals, for example, 196584 + ... + 197317.

It is an arithmetic number, because the mean of its divisors is an integer number (36238984).

Almost surely, 2^144561667 is an apocalyptic number.

144561667 is a deficient number, since it is larger than the sum of its proper divisors (394269).

144561667 is an equidigital number, since it uses as much as digits as its factorization.

144561667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394268.

The product of its digits is 120960, while the sum is 40.

The square root of 144561667 is about 12023.3800156196. The cubic root of 144561667 is about 524.8288687888.

The spelling of 144561667 in words is "one hundred forty-four million, five hundred sixty-one thousand, six hundred sixty-seven".