783361409 has 2 divisors, whose sum is σ = 783361410. Its totient is φ = 783361408.

The previous prime is 783361399. The next prime is 783361421. The reversal of 783361409 is 904163387.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 474586225 + 308775184 = 21785^2 + 17572^2 .

It is a cyclic number.

It is not a de Polignac number, because 783361409 - 2¹⁶ = 783295873 is a prime.

It is a super-2 number, since 2×783361409² = 1227310194220930562, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (783361489) 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, 391680704 + 391680705.

It is an arithmetic number, because the mean of its divisors is an integer number (391680705).

Almost surely, 2^783361409 is an apocalyptic number.

It is an amenable number.

783361409 is a deficient number, since it is larger than the sum of its proper divisors (1).

783361409 is an equidigital number, since it uses as much as digits as its factorization.

783361409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108864, while the sum is 41.

The square root of 783361409 is about 27988.5942662364. The cubic root of 783361409 is about 921.8368346992.

The spelling of 783361409 in words is "seven hundred eighty-three million, three hundred sixty-one thousand, four hundred nine".