12925309 has 2 divisors, whose sum is σ = 12925310. Its totient is φ = 12925308.

The previous prime is 12925277. The next prime is 12925313. The reversal of 12925309 is 90352921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10381284 + 2544025 = 3222^2 + 1595^2 .

It is an emirp because it is prime and its reverse (90352921) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 12925309 - 2⁵ = 12925277 is a prime.

It is a super-2 number, since 2×12925309² = 334127225490962, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12925369) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6462654 + 6462655.

It is an arithmetic number, because the mean of its divisors is an integer number (6462655).

Almost surely, 2^12925309 is an apocalyptic number.

It is an amenable number.

12925309 is a deficient number, since it is larger than the sum of its proper divisors (1).

12925309 is an equidigital number, since it uses as much as digits as its factorization.

12925309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4860, while the sum is 31.

The square root of 12925309 is about 3595.1785769277. The cubic root of 12925309 is about 234.6822868157.

The spelling of 12925309 in words is "twelve million, nine hundred twenty-five thousand, three hundred nine".