440109001 has 2 divisors, whose sum is σ = 440109002. Its totient is φ = 440109000.

The previous prime is 440108947. The next prime is 440109011. The reversal of 440109001 is 100901044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 437813776 + 2295225 = 20924^2 + 1515^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440109001 is a prime.

It is a super-2 number, since 2×440109001² = 387391865522436002, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 440109001.

It is not a weakly prime, because it can be changed into another prime (440109011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220054500 + 220054501.

It is an arithmetic number, because the mean of its divisors is an integer number (220054501).

Almost surely, 2^440109001 is an apocalyptic number.

It is an amenable number.

440109001 is a deficient number, since it is larger than the sum of its proper divisors (1).

440109001 is an equidigital number, since it uses as much as digits as its factorization.

440109001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 144, while the sum is 19.

The square root of 440109001 is about 20978.7750119019. The cubic root of 440109001 is about 760.6532938789.

The spelling of 440109001 in words is "four hundred forty million, one hundred nine thousand, one".