144813457 has 4 divisors (see below), whose sum is σ = 145348096. Its totient is φ = 144278820.

The previous prime is 144813433. The next prime is 144813491. The reversal of 144813457 is 754318441.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 754318441 = 17 ⋅44371673.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144813457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144813407) 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, 266913 + ... + 267454.

It is an arithmetic number, because the mean of its divisors is an integer number (36337024).

Almost surely, 2^144813457 is an apocalyptic number.

It is an amenable number.

144813457 is a deficient number, since it is larger than the sum of its proper divisors (534639).

144813457 is an equidigital number, since it uses as much as digits as its factorization.

144813457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 534638.

The product of its digits is 53760, while the sum is 37.

The square root of 144813457 is about 12033.8463094723. The cubic root of 144813457 is about 525.1333986034.

The spelling of 144813457 in words is "one hundred forty-four million, eight hundred thirteen thousand, four hundred fifty-seven".