83704009 has 2 divisors, whose sum is σ = 83704010. Its totient is φ = 83704008.

The previous prime is 83704003. The next prime is 83704021. The reversal of 83704009 is 90040738.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69806025 + 13897984 = 8355^2 + 3728^2 .

It is a cyclic number.

It is not a de Polignac number, because 83704009 - 2¹⁹ = 83179721 is a prime.

It is a super-2 number, since 2×83704009² = 14012722245344162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (83704003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 41852004 + 41852005.

It is an arithmetic number, because the mean of its divisors is an integer number (41852005).

Almost surely, 2^83704009 is an apocalyptic number.

It is an amenable number.

83704009 is a deficient number, since it is larger than the sum of its proper divisors (1).

83704009 is an equidigital number, since it uses as much as digits as its factorization.

83704009 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 31.

The square root of 83704009 is about 9148.9895070439. The cubic root of 83704009 is about 437.4369045336.

The spelling of 83704009 in words is "eighty-three million, seven hundred four thousand, nine".