144431377 has 2 divisors, whose sum is σ = 144431378. Its totient is φ = 144431376.

The previous prime is 144431359. The next prime is 144431381. The reversal of 144431377 is 773134441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 144216081 + 215296 = 12009^2 + 464^2 .

It is a cyclic number.

It is not a de Polignac number, because 144431377 - 2¹⁵ = 144398609 is a prime.

It is a super-2 number, since 2×144431377² = 41720845324232258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (144431317) 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, 72215688 + 72215689.

It is an arithmetic number, because the mean of its divisors is an integer number (72215689).

Almost surely, 2^144431377 is an apocalyptic number.

It is an amenable number.

144431377 is a deficient number, since it is larger than the sum of its proper divisors (1).

144431377 is an equidigital number, since it uses as much as digits as its factorization.

144431377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28224, while the sum is 34.

The square root of 144431377 is about 12017.9606007009. The cubic root of 144431377 is about 524.6711494613.

The spelling of 144431377 in words is "one hundred forty-four million, four hundred thirty-one thousand, three hundred seventy-seven".