834747409 has 2 divisors, whose sum is σ = 834747410. Its totient is φ = 834747408.

The previous prime is 834747391. The next prime is 834747421. The reversal of 834747409 is 904747438.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 700766784 + 133980625 = 26472^2 + 11575^2 .

It is a cyclic number.

It is not a de Polignac number, because 834747409 - 2¹⁷ = 834616337 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (834747449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 417373704 + 417373705.

It is an arithmetic number, because the mean of its divisors is an integer number (417373705).

Almost surely, 2^834747409 is an apocalyptic number.

It is an amenable number.

834747409 is a deficient number, since it is larger than the sum of its proper divisors (1).

834747409 is an equidigital number, since it uses as much as digits as its factorization.

834747409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 677376, while the sum is 46.

The square root of 834747409 is about 28891.9955870134. The cubic root of 834747409 is about 941.5680065517.

The spelling of 834747409 in words is "eight hundred thirty-four million, seven hundred forty-seven thousand, four hundred nine".