144489731 has 2 divisors, whose sum is σ = 144489732. Its totient is φ = 144489730.

The previous prime is 144489707. The next prime is 144489743. The reversal of 144489731 is 137984441.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 144489731 - 2²² = 140295427 is a prime.

It is a super-2 number, since 2×144489731² = 41754564728904722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (144489701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72244865 + 72244866.

It is an arithmetic number, because the mean of its divisors is an integer number (72244866).

Almost surely, 2^144489731 is an apocalyptic number.

144489731 is a deficient number, since it is larger than the sum of its proper divisors (1).

144489731 is an equidigital number, since it uses as much as digits as its factorization.

144489731 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 96768, while the sum is 41.

The square root of 144489731 is about 12020.3881384920. The cubic root of 144489731 is about 524.7418001711.

The spelling of 144489731 in words is "one hundred forty-four million, four hundred eighty-nine thousand, seven hundred thirty-one".