144213649 has 8 divisors (see below), whose sum is σ = 145852520. Its totient is φ = 142580736.

The previous prime is 144213623. The next prime is 144213659. The reversal of 144213649 is 946312441.

It can be written as a sum of positive squares in 4 ways, for example, as 65092624 + 79121025 = 8068^2 + 8895^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 144213649 - 2⁷ = 144213521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144213659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61747 + ... + 64039.

It is an arithmetic number, because the mean of its divisors is an integer number (18231565).

Almost surely, 2^144213649 is an apocalyptic number.

It is an amenable number.

144213649 is a deficient number, since it is larger than the sum of its proper divisors (1638871).

144213649 is a wasteful number, since it uses less digits than its factorization.

144213649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979.

The product of its digits is 20736, while the sum is 34.

The square root of 144213649 is about 12008.8987421828. The cubic root of 144213649 is about 524.4073724038.

The spelling of 144213649 in words is "one hundred forty-four million, two hundred thirteen thousand, six hundred forty-nine".