144881977 has 2 divisors, whose sum is σ = 144881978. Its totient is φ = 144881976.

The previous prime is 144881953. The next prime is 144882043. The reversal of 144881977 is 779188441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 136679481 + 8202496 = 11691^2 + 2864^2 .

It is a cyclic number.

It is not a de Polignac number, because 144881977 - 2²³ = 136493369 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 144881977.

It is not a weakly prime, because it can be changed into another prime (144881377) 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, 72440988 + 72440989.

It is an arithmetic number, because the mean of its divisors is an integer number (72440989).

Almost surely, 2^144881977 is an apocalyptic number.

It is an amenable number.

144881977 is a deficient number, since it is larger than the sum of its proper divisors (1).

144881977 is an equidigital number, since it uses as much as digits as its factorization.

144881977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 451584, while the sum is 49.

The square root of 144881977 is about 12036.6929428311. The cubic root of 144881977 is about 525.2162096616.

The spelling of 144881977 in words is "one hundred forty-four million, eight hundred eighty-one thousand, nine hundred seventy-seven".