144477409 has 2 divisors, whose sum is σ = 144477410. Its totient is φ = 144477408.

The previous prime is 144477367. The next prime is 144477427. The reversal of 144477409 is 904774441.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 87142225 + 57335184 = 9335^2 + 7572^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-144477409 is a prime.

It is a super-2 number, since 2×144477409² = 41747443422706562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (144471409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72238704 + 72238705.

It is an arithmetic number, because the mean of its divisors is an integer number (72238705).

Almost surely, 2^144477409 is an apocalyptic number.

It is an amenable number.

144477409 is a deficient number, since it is larger than the sum of its proper divisors (1).

144477409 is an equidigital number, since it uses as much as digits as its factorization.

144477409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 112896, while the sum is 40.

The square root of 144477409 is about 12019.8755817188. The cubic root of 144477409 is about 524.7268831888.

The spelling of 144477409 in words is "one hundred forty-four million, four hundred seventy-seven thousand, four hundred nine".