144390813 has 8 divisors (see below), whose sum is σ = 220024128. Its totient is φ = 82509024.

The previous prime is 144390811. The next prime is 144390821. The reversal of 144390813 is 318093441.

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

It is not a de Polignac number, because 144390813 - 2¹ = 144390811 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144390811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3437856 + ... + 3437897.

It is an arithmetic number, because the mean of its divisors is an integer number (27503016).

Almost surely, 2^144390813 is an apocalyptic number.

It is an amenable number.

144390813 is a deficient number, since it is larger than the sum of its proper divisors (75633315).

144390813 is an equidigital number, since it uses as much as digits as its factorization.

144390813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6875763.

The product of its (nonzero) digits is 10368, while the sum is 33.

The square root of 144390813 is about 12016.2728414430. The cubic root of 144390813 is about 524.6220263560.

The spelling of 144390813 in words is "one hundred forty-four million, three hundred ninety thousand, eight hundred thirteen".