144539697 has 4 divisors (see below), whose sum is σ = 192719600. Its totient is φ = 96359796.

The previous prime is 144539693. The next prime is 144539737. The reversal of 144539697 is 796935441.

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.

It is not a de Polignac number, because 144539697 - 2² = 144539693 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (144539693) 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, 24089947 + ... + 24089952.

It is an arithmetic number, because the mean of its divisors is an integer number (48179900).

Almost surely, 2^144539697 is an apocalyptic number.

It is an amenable number.

144539697 is a deficient number, since it is larger than the sum of its proper divisors (48179903).

144539697 is an equidigital number, since it uses as much as digits as its factorization.

144539697 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48179902.

The product of its digits is 816480, while the sum is 48.

The square root of 144539697 is about 12022.4663443072. The cubic root of 144539697 is about 524.8022801948.

The spelling of 144539697 in words is "one hundred forty-four million, five hundred thirty-nine thousand, six hundred ninety-seven".