144939619 has 16 divisors (see below), whose sum is σ = 170945280. Its totient is φ = 121448160.

The previous prime is 144939617. The next prime is 144939623. The reversal of 144939619 is 916939441.

It is a cyclic number.

It is not a de Polignac number, because 144939619 - 2¹ = 144939617 is a prime.

It is a super-2 number, since 2×144939619² = 42014986311730322, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (144939611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1639 + ... + 17104.

It is an arithmetic number, because the mean of its divisors is an integer number (10684080).

Almost surely, 2^144939619 is an apocalyptic number.

144939619 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

144939619 is a deficient number, since it is larger than the sum of its proper divisors (26005661).

144939619 is a wasteful number, since it uses less digits than its factorization.

144939619 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18810.

The product of its digits is 209952, while the sum is 46.

The square root of 144939619 is about 12039.0871331675. The cubic root of 144939619 is about 525.2858537018.

The spelling of 144939619 in words is "one hundred forty-four million, nine hundred thirty-nine thousand, six hundred nineteen".