144509961 has 4 divisors (see below), whose sum is σ = 192679952. Its totient is φ = 96339972.

The previous prime is 144509951. The next prime is 144509969. The reversal of 144509961 is 169905441.

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 144509961 - 2¹⁰ = 144508937 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (144509969) 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, 24084991 + ... + 24084996.

It is an arithmetic number, because the mean of its divisors is an integer number (48169988).

Almost surely, 2^144509961 is an apocalyptic number.

It is an amenable number.

144509961 is a deficient number, since it is larger than the sum of its proper divisors (48169991).

144509961 is an equidigital number, since it uses as much as digits as its factorization.

144509961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48169990.

The product of its (nonzero) digits is 38880, while the sum is 39.

The square root of 144509961 is about 12021.2295960106. The cubic root of 144509961 is about 524.7662887193.

The spelling of 144509961 in words is "one hundred forty-four million, five hundred nine thousand, nine hundred sixty-one".