440400461 has 2 divisors, whose sum is σ = 440400462. Its totient is φ = 440400460.

The previous prime is 440400421. The next prime is 440400463. The reversal of 440400461 is 164004044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 409252900 + 31147561 = 20230^2 + 5581^2 .

It is a cyclic number.

It is not a de Polignac number, because 440400461 - 2¹⁸ = 440138317 is a prime.

Together with 440400463, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440400463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220200230 + 220200231.

It is an arithmetic number, because the mean of its divisors is an integer number (220200231).

Almost surely, 2^440400461 is an apocalyptic number.

It is an amenable number.

440400461 is a deficient number, since it is larger than the sum of its proper divisors (1).

440400461 is an equidigital number, since it uses as much as digits as its factorization.

440400461 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 440400461 is about 20985.7204069815. The cubic root of 440400461 is about 760.8211697813.

The spelling of 440400461 in words is "four hundred forty million, four hundred thousand, four hundred sixty-one".