806733409 has 2 divisors, whose sum is σ = 806733410. Its totient is φ = 806733408.

The previous prime is 806733377. The next prime is 806733437. The reversal of 806733409 is 904337608.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 425390625 + 381342784 = 20625^2 + 19528^2 .

It is a cyclic number.

It is not a de Polignac number, because 806733409 - 2⁵ = 806733377 is a prime.

It is a super-2 number, since 2×806733409² = 1301637586393522562, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (806733509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 403366704 + 403366705.

It is an arithmetic number, because the mean of its divisors is an integer number (403366705).

Almost surely, 2^806733409 is an apocalyptic number.

It is an amenable number.

806733409 is a deficient number, since it is larger than the sum of its proper divisors (1).

806733409 is an equidigital number, since it uses as much as digits as its factorization.

806733409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 40.

The square root of 806733409 is about 28403.0528112737. The cubic root of 806733409 is about 930.9149699502.

The spelling of 806733409 in words is "eight hundred six million, seven hundred thirty-three thousand, four hundred nine".