25670009 has 2 divisors, whose sum is σ = 25670010. Its totient is φ = 25670008.

The previous prime is 25669981. The next prime is 25670033. The reversal of 25670009 is 90007652.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 25030009 + 640000 = 5003^2 + 800^2 .

It is a cyclic number.

It is not a de Polignac number, because 25670009 - 2¹⁶ = 25604473 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25670039) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12835004 + 12835005.

It is an arithmetic number, because the mean of its divisors is an integer number (12835005).

Almost surely, 2^25670009 is an apocalyptic number.

It is an amenable number.

25670009 is a deficient number, since it is larger than the sum of its proper divisors (1).

25670009 is an equidigital number, since it uses as much as digits as its factorization.

25670009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3780, while the sum is 29.

The square root of 25670009 is about 5066.5579045344. The cubic root of 25670009 is about 294.9909371917.

The spelling of 25670009 in words is "twenty-five million, six hundred seventy thousand, nine".