144555091 has 2 divisors, whose sum is σ = 144555092. Its totient is φ = 144555090.

The previous prime is 144555049. The next prime is 144555109. The reversal of 144555091 is 190555441.

It is a happy number.

Together with next prime (144555109) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is an emirp because it is prime and its reverse (190555441) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144555091 is a prime.

It is not a weakly prime, because it can be changed into another prime (144555001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72277545 + 72277546.

It is an arithmetic number, because the mean of its divisors is an integer number (72277546).

Almost surely, 2^144555091 is an apocalyptic number.

144555091 is a deficient number, since it is larger than the sum of its proper divisors (1).

144555091 is an equidigital number, since it uses as much as digits as its factorization.

144555091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18000, while the sum is 34.

The square root of 144555091 is about 12023.1065453151. The cubic root of 144555091 is about 524.8209106464.

The spelling of 144555091 in words is "one hundred forty-four million, five hundred fifty-five thousand, ninety-one".