144923491 has 2 divisors, whose sum is σ = 144923492. Its totient is φ = 144923490.

The previous prime is 144923489. The next prime is 144923497. The reversal of 144923491 is 194329441.

144923491 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 144923491 - 2¹ = 144923489 is a prime.

Together with 144923489, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 144923491.

It is not a weakly prime, because it can be changed into another prime (144923497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72461745 + 72461746.

It is an arithmetic number, because the mean of its divisors is an integer number (72461746).

Almost surely, 2^144923491 is an apocalyptic number.

144923491 is a deficient number, since it is larger than the sum of its proper divisors (1).

144923491 is an equidigital number, since it uses as much as digits as its factorization.

144923491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 31104, while the sum is 37.

The square root of 144923491 is about 12038.4172963060. The cubic root of 144923491 is about 525.2663694399.

The spelling of 144923491 in words is "one hundred forty-four million, nine hundred twenty-three thousand, four hundred ninety-one".