34247309 has 2 divisors, whose sum is σ = 34247310. Its totient is φ = 34247308.

The previous prime is 34247287. The next prime is 34247327. The reversal of 34247309 is 90374243.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31696900 + 2550409 = 5630^2 + 1597^2 .

It is an emirp because it is prime and its reverse (90374243) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-34247309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34247359) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17123654 + 17123655.

It is an arithmetic number, because the mean of its divisors is an integer number (17123655).

Almost surely, 2^34247309 is an apocalyptic number.

It is an amenable number.

34247309 is a deficient number, since it is larger than the sum of its proper divisors (1).

34247309 is an equidigital number, since it uses as much as digits as its factorization.

34247309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18144, while the sum is 32.

The square root of 34247309 is about 5852.1200431980. The cubic root of 34247309 is about 324.7447589660.

The spelling of 34247309 in words is "thirty-four million, two hundred forty-seven thousand, three hundred nine".