440094821 has 2 divisors, whose sum is σ = 440094822. Its totient is φ = 440094820.

The previous prime is 440094791. The next prime is 440094829. The reversal of 440094821 is 128490044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 371949796 + 68145025 = 19286^2 + 8255^2 .

It is a cyclic number.

It is not a de Polignac number, because 440094821 - 2¹⁸ = 439832677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440094829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220047410 + 220047411.

It is an arithmetic number, because the mean of its divisors is an integer number (220047411).

Almost surely, 2^440094821 is an apocalyptic number.

It is an amenable number.

440094821 is a deficient number, since it is larger than the sum of its proper divisors (1).

440094821 is an equidigital number, since it uses as much as digits as its factorization.

440094821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9216, while the sum is 32.

The square root of 440094821 is about 20978.4370485506. The cubic root of 440094821 is about 760.6451245546.

The spelling of 440094821 in words is "four hundred forty million, ninety-four thousand, eight hundred twenty-one".