144697139 has 4 divisors (see below), whose sum is σ = 144721920. Its totient is φ = 144672360.

The previous prime is 144697129. The next prime is 144697151. The reversal of 144697139 is 931796441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 931796441 = 1129 ⋅825329.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144697139 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 144697139.

It is not an unprimeable number, because it can be changed into a prime (144697129) 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 in 3 ways as a sum of consecutive naturals, for example, 1742 + ... + 17100.

It is an arithmetic number, because the mean of its divisors is an integer number (36180480).

Almost surely, 2^144697139 is an apocalyptic number.

144697139 is a deficient number, since it is larger than the sum of its proper divisors (24781).

144697139 is an equidigital number, since it uses as much as digits as its factorization.

144697139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24780.

The product of its digits is 163296, while the sum is 44.

The square root of 144697139 is about 12029.0123867257. The cubic root of 144697139 is about 524.9927605956.

The spelling of 144697139 in words is "one hundred forty-four million, six hundred ninety-seven thousand, one hundred thirty-nine".