144978013 has 8 divisors (see below), whose sum is σ = 146178648. Its totient is φ = 143782464.

The previous prime is 144978011. The next prime is 144978049. The reversal of 144978013 is 310879441.

It can be written as a sum of positive squares in 4 ways, for example, as 44116164 + 100861849 = 6642^2 + 10043^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144978013 - 2¹ = 144978011 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144978011) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72495 + ... + 74467.

It is an arithmetic number, because the mean of its divisors is an integer number (18272331).

Almost surely, 2^144978013 is an apocalyptic number.

It is an amenable number.

144978013 is a deficient number, since it is larger than the sum of its proper divisors (1200635).

144978013 is a wasteful number, since it uses less digits than its factorization.

144978013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2543.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 144978013 is about 12040.6815836978. The cubic root of 144978013 is about 525.3322317377.

The spelling of 144978013 in words is "one hundred forty-four million, nine hundred seventy-eight thousand, thirteen".