25273009 has 2 divisors, whose sum is σ = 25273010. Its totient is φ = 25273008.

The previous prime is 25272991. The next prime is 25273013. The reversal of 25273009 is 90037252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 15681600 + 9591409 = 3960^2 + 3097^2 .

It is a cyclic number.

It is not a de Polignac number, because 25273009 - 2⁵ = 25272977 is a prime.

It is not a weakly prime, because it can be changed into another prime (25273019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12636504 + 12636505.

It is an arithmetic number, because the mean of its divisors is an integer number (12636505).

Almost surely, 2^25273009 is an apocalyptic number.

It is an amenable number.

25273009 is a deficient number, since it is larger than the sum of its proper divisors (1).

25273009 is an equidigital number, since it uses as much as digits as its factorization.

25273009 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 28.

The square root of 25273009 is about 5027.2267702979. The cubic root of 25273009 is about 293.4623002403.

The spelling of 25273009 in words is "twenty-five million, two hundred seventy-three thousand, nine".