144781723 has 4 divisors (see below), whose sum is σ = 144977328. Its totient is φ = 144586120.

The previous prime is 144781627. The next prime is 144781727. The reversal of 144781723 is 327187441.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144781723 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144781727) 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, 96688 + ... + 98173.

It is an arithmetic number, because the mean of its divisors is an integer number (36244332).

Almost surely, 2^144781723 is an apocalyptic number.

144781723 is a deficient number, since it is larger than the sum of its proper divisors (195605).

144781723 is an equidigital number, since it uses as much as digits as its factorization.

144781723 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195604.

The product of its digits is 37632, while the sum is 37.

The square root of 144781723 is about 12032.5277061804. The cubic root of 144781723 is about 525.0950370657.

The spelling of 144781723 in words is "one hundred forty-four million, seven hundred eighty-one thousand, seven hundred twenty-three".