144684947 has 4 divisors (see below), whose sum is σ = 157838136. Its totient is φ = 131531760.

The previous prime is 144684931. The next prime is 144684949. The reversal of 144684947 is 749486441.

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 144684947 - 2⁴ = 144684931 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144684949) 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, 6576578 + ... + 6576599.

It is an arithmetic number, because the mean of its divisors is an integer number (39459534).

Almost surely, 2^144684947 is an apocalyptic number.

144684947 is a deficient number, since it is larger than the sum of its proper divisors (13153189).

144684947 is a wasteful number, since it uses less digits than its factorization.

144684947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13153188.

The product of its digits is 774144, while the sum is 47.

The square root of 144684947 is about 12028.5056012790. The cubic root of 144684947 is about 524.9780151036.

The spelling of 144684947 in words is "one hundred forty-four million, six hundred eighty-four thousand, nine hundred forty-seven".