144993457 has 8 divisors (see below), whose sum is σ = 166084416. Its totient is φ = 123996912.

The previous prime is 144993439. The next prime is 144993469. The reversal of 144993457 is 754399441.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144993457 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144993437) 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, 20278 + ... + 26479.

It is an arithmetic number, because the mean of its divisors is an integer number (20760552).

Almost surely, 2^144993457 is an apocalyptic number.

It is an amenable number.

144993457 is a deficient number, since it is larger than the sum of its proper divisors (21090959).

144993457 is an equidigital number, since it uses as much as digits as its factorization.

144993457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47207.

The product of its digits is 544320, while the sum is 46.

The square root of 144993457 is about 12041.3228924400. The cubic root of 144993457 is about 525.3508850096.

It can be divided in two parts, 14499 and 3457, that added together give a square (17956 = 134²).

The spelling of 144993457 in words is "one hundred forty-four million, nine hundred ninety-three thousand, four hundred fifty-seven".