144550139 has 4 divisors (see below), whose sum is σ = 144628080. Its totient is φ = 144472200.

The previous prime is 144550121. The next prime is 144550163. The reversal of 144550139 is 931055441.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 144550139 - 2¹² = 144546043 is a prime.

It is not an unprimeable number, because it can be changed into a prime (144550169) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 36119 + ... + 39920.

It is an arithmetic number, because the mean of its divisors is an integer number (36157020).

Almost surely, 2^144550139 is an apocalyptic number.

144550139 is a deficient number, since it is larger than the sum of its proper divisors (77941).

144550139 is an equidigital number, since it uses as much as digits as its factorization.

144550139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77940.

The product of its (nonzero) digits is 10800, while the sum is 32.

The square root of 144550139 is about 12022.9006067588. The cubic root of 144550139 is about 524.8149176768.

The spelling of 144550139 in words is "one hundred forty-four million, five hundred fifty thousand, one hundred thirty-nine".