144391001 has 2 divisors, whose sum is σ = 144391002. Its totient is φ = 144391000.

The previous prime is 144390997. The next prime is 144391021. The reversal of 144391001 is 100193441.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 85470025 + 58920976 = 9245^2 + 7676^2 .

It is a cyclic number.

It is not a de Polignac number, because 144391001 - 2² = 144390997 is a prime.

It is a super-2 number, since 2×144391001² = 41697522339564002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (144391021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 72195500 + 72195501.

It is an arithmetic number, because the mean of its divisors is an integer number (72195501).

Almost surely, 2^144391001 is an apocalyptic number.

It is an amenable number.

144391001 is a deficient number, since it is larger than the sum of its proper divisors (1).

144391001 is an equidigital number, since it uses as much as digits as its factorization.

144391001 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 432, while the sum is 23.

The square root of 144391001 is about 12016.2806641656. The cubic root of 144391001 is about 524.6222540456.

The spelling of 144391001 in words is "one hundred forty-four million, three hundred ninety-one thousand, one".