440774981 has 2 divisors, whose sum is σ = 440774982. Its totient is φ = 440774980.

The previous prime is 440774953. The next prime is 440774987. The reversal of 440774981 is 189477044.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 402644356 + 38130625 = 20066^2 + 6175^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-440774981 is a prime.

It is a super-2 number, since 2×440774981² = 388565167751100722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (440774987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 220387490 + 220387491.

It is an arithmetic number, because the mean of its divisors is an integer number (220387491).

Almost surely, 2^440774981 is an apocalyptic number.

It is an amenable number.

440774981 is a deficient number, since it is larger than the sum of its proper divisors (1).

440774981 is an equidigital number, since it uses as much as digits as its factorization.

440774981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 225792, while the sum is 44.

The square root of 440774981 is about 20994.6417211630. The cubic root of 440774981 is about 761.0367781010.

The spelling of 440774981 in words is "four hundred forty million, seven hundred seventy-four thousand, nine hundred eighty-one".