144093749 has 4 divisors (see below), whose sum is σ = 145415820. Its totient is φ = 142771680.

The previous prime is 144093743. The next prime is 144093757. The reversal of 144093749 is 947390441.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 123099025 + 20994724 = 11095^2 + 4582^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144093749 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 (144093743) 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 3 ways as a sum of consecutive naturals, for example, 660872 + ... + 661089.

It is an arithmetic number, because the mean of its divisors is an integer number (36353955).

Almost surely, 2^144093749 is an apocalyptic number.

It is an amenable number.

144093749 is a deficient number, since it is larger than the sum of its proper divisors (1322071).

144093749 is a wasteful number, since it uses less digits than its factorization.

144093749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1322070.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 144093749 is about 12003.9055727709. The cubic root of 144093749 is about 524.2620004095.

The spelling of 144093749 in words is "one hundred forty-four million, ninety-three thousand, seven hundred forty-nine".