144499999 has 4 divisors (see below), whose sum is σ = 165142864. Its totient is φ = 123857136.

The previous prime is 144499991. The next prime is 144500003. The reversal of 144499999 is 999994441.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999994441 = 1123 ⋅890467.

It is a cyclic number.

It is not a de Polignac number, because 144499999 - 2³ = 144499991 is a prime.

It is a super-2 number, since 2×144499999² = 41760499422000002, which contains 22 as substring.

It is a Duffinian number.

144499999 is a modest number, since divided by 99999 gives 1444 as remainder.

It is a plaindrome in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144499991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10321422 + ... + 10321435.

It is an arithmetic number, because the mean of its divisors is an integer number (41285716).

Almost surely, 2^144499999 is an apocalyptic number.

144499999 is a deficient number, since it is larger than the sum of its proper divisors (20642865).

144499999 is an equidigital number, since it uses as much as digits as its factorization.

144499999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20642864.

The product of its digits is 3779136, while the sum is 58.

The square root of 144499999 is about 12020.8152385768. The cubic root of 144499999 is about 524.7542299383.

The spelling of 144499999 in words is "one hundred forty-four million, four hundred ninety-nine thousand, nine hundred ninety-nine".