144797761 has 6 divisors (see below), whose sum is σ = 148818390. Its totient is φ = 140882976.

The previous prime is 144797747. The next prime is 144797767. The reversal of 144797761 is 167797441.

It can be written as a sum of positive squares in 3 ways, for example, as 126135361 + 18662400 = 11231^2 + 4320^2 .

It is not a de Polignac number, because 144797761 - 2⁵ = 144797729 is a prime.

It is a super-2 number, since 2×144797761² = 41932783181226242, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144797767) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 51516 + ... + 54253.

It is an arithmetic number, because the mean of its divisors is an integer number (24803065).

Almost surely, 2^144797761 is an apocalyptic number.

It is an amenable number.

144797761 is a deficient number, since it is larger than the sum of its proper divisors (4020629).

144797761 is an equidigital number, since it uses as much as digits as its factorization.

144797761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105843 (or 105806 counting only the distinct ones).

The product of its digits is 296352, while the sum is 46.

The square root of 144797761 is about 12033.1941312355. The cubic root of 144797761 is about 525.1144252478.

The spelling of 144797761 in words is "one hundred forty-four million, seven hundred ninety-seven thousand, seven hundred sixty-one".