34172309 has 2 divisors, whose sum is σ = 34172310. Its totient is φ = 34172308.

The previous prime is 34172291. The next prime is 34172377. The reversal of 34172309 is 90327143.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29398084 + 4774225 = 5422^2 + 2185^2 .

It is a cyclic number.

It is not a de Polignac number, because 34172309 - 2²⁰ = 33123733 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (34172389) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17086154 + 17086155.

It is an arithmetic number, because the mean of its divisors is an integer number (17086155).

Almost surely, 2^34172309 is an apocalyptic number.

It is an amenable number.

34172309 is a deficient number, since it is larger than the sum of its proper divisors (1).

34172309 is an equidigital number, since it uses as much as digits as its factorization.

34172309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 34172309 is about 5845.7085969111. The cubic root of 34172309 is about 324.5075271105.

The spelling of 34172309 in words is "thirty-four million, one hundred seventy-two thousand, three hundred nine".