144191919 has 16 divisors (see below), whose sum is σ = 194832000. Its totient is φ = 94849056.

The previous prime is 144191917. The next prime is 144191921. The reversal of 144191919 is 919191441.

It is an interprime number because it is at equal distance from previous prime (144191917) and next prime (144191921).

It is not a de Polignac number, because 144191919 - 2¹ = 144191917 is a prime.

It is a super-2 number, since 2×144191919² = 41582619009805122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144191917) 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, 71872 + ... + 73850.

It is an arithmetic number, because the mean of its divisors is an integer number (12177000).

Almost surely, 2^144191919 is an apocalyptic number.

144191919 is a deficient number, since it is larger than the sum of its proper divisors (50640081).

144191919 is a wasteful number, since it uses less digits than its factorization.

144191919 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2294.

The product of its digits is 11664, while the sum is 39.

The square root of 144191919 is about 12007.9939623569. The cubic root of 144191919 is about 524.3810319830.

The spelling of 144191919 in words is "one hundred forty-four million, one hundred ninety-one thousand, nine hundred nineteen".