144669819 has 16 divisors (see below), whose sum is σ = 232052480. Its totient is φ = 78317280.

The previous prime is 144669809. The next prime is 144669821. The reversal of 144669819 is 918966441.

It is not a de Polignac number, because 144669819 - 2⁴ = 144669803 is a prime.

It is a super-2 number, since 2×144669819² = 41858713058985522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144669809) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 180892 + ... + 181689.

It is an arithmetic number, because the mean of its divisors is an integer number (14503280).

Almost surely, 2^144669819 is an apocalyptic number.

144669819 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

144669819 is a deficient number, since it is larger than the sum of its proper divisors (87382661).

144669819 is a wasteful number, since it uses less digits than its factorization.

144669819 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 362610.

The product of its digits is 373248, while the sum is 48.

The square root of 144669819 is about 12027.8767452947. The cubic root of 144669819 is about 524.9597175442.

The spelling of 144669819 in words is "one hundred forty-four million, six hundred sixty-nine thousand, eight hundred nineteen".