25070209 has 2 divisors, whose sum is σ = 25070210. Its totient is φ = 25070208.

The previous prime is 25070197. The next prime is 25070237. The reversal of 25070209 is 90207052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 15429184 + 9641025 = 3928^2 + 3105^2 .

It is a cyclic number.

It is not a de Polignac number, because 25070209 - 2¹¹ = 25068161 is a prime.

It is not a weakly prime, because it can be changed into another prime (25070009) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12535104 + 12535105.

It is an arithmetic number, because the mean of its divisors is an integer number (12535105).

Almost surely, 2^25070209 is an apocalyptic number.

It is an amenable number.

25070209 is a deficient number, since it is larger than the sum of its proper divisors (1).

25070209 is an equidigital number, since it uses as much as digits as its factorization.

25070209 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 25070209 is about 5007.0159776058. The cubic root of 25070209 is about 292.6752411311.

The spelling of 25070209 in words is "twenty-five million, seventy thousand, two hundred nine".