144189999 has 12 divisors (see below), whose sum is σ = 213903976. Its totient is φ = 93528432.

The previous prime is 144189977. The next prime is 144190019. The reversal of 144189999 is 999981441.

It is not a de Polignac number, because 144189999 - 2¹² = 144185903 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144189919) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 216169 + ... + 216834.

Almost surely, 2^144189999 is an apocalyptic number.

144189999 is a deficient number, since it is larger than the sum of its proper divisors (69713977).

144189999 is a wasteful number, since it uses less digits than its factorization.

144189999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433046 (or 433043 counting only the distinct ones).

The product of its digits is 839808, while the sum is 54.

The square root of 144189999 is about 12007.9140153484. The cubic root of 144189999 is about 524.3787044923.

The spelling of 144189999 in words is "one hundred forty-four million, one hundred eighty-nine thousand, nine hundred ninety-nine".