76305209 has 2 divisors, whose sum is σ = 76305210. Its totient is φ = 76305208.

The previous prime is 76305133. The next prime is 76305217. The reversal of 76305209 is 90250367.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 48511225 + 27793984 = 6965^2 + 5272^2 .

It is a cyclic number.

It is not a de Polignac number, because 76305209 - 2²⁰ = 75256633 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (76305259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38152604 + 38152605.

It is an arithmetic number, because the mean of its divisors is an integer number (38152605).

Almost surely, 2^76305209 is an apocalyptic number.

It is an amenable number.

76305209 is a deficient number, since it is larger than the sum of its proper divisors (1).

76305209 is an equidigital number, since it uses as much as digits as its factorization.

76305209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 76305209 is about 8735.2852844083. The cubic root of 76305209 is about 424.1486236567.

The spelling of 76305209 in words is "seventy-six million, three hundred five thousand, two hundred nine".