43102009 has 2 divisors, whose sum is σ = 43102010. Its totient is φ = 43102008.

The previous prime is 43101973. The next prime is 43102027. The reversal of 43102009 is 90020134.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22353984 + 20748025 = 4728^2 + 4555^2 .

It is a cyclic number.

It is not a de Polignac number, because 43102009 - 2⁷ = 43101881 is a prime.

It is not a weakly prime, because it can be changed into another prime (43102049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21551004 + 21551005.

It is an arithmetic number, because the mean of its divisors is an integer number (21551005).

Almost surely, 2^43102009 is an apocalyptic number.

It is an amenable number.

43102009 is a deficient number, since it is larger than the sum of its proper divisors (1).

43102009 is an equidigital number, since it uses as much as digits as its factorization.

43102009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 43102009 is about 6565.2120300871. The cubic root of 43102009 is about 350.6166245671.

It can be divided in two parts, 4 and 3102009, that added together give a palindrome (3102013).

The spelling of 43102009 in words is "forty-three million, one hundred two thousand, nine".