25308649 has 2 divisors, whose sum is σ = 25308650. Its totient is φ = 25308648.

The previous prime is 25308641. The next prime is 25308653. The reversal of 25308649 is 94680352.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 21576025 + 3732624 = 4645^2 + 1932^2 .

It is a cyclic number.

It is not a de Polignac number, because 25308649 - 2³ = 25308641 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25308641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12654324 + 12654325.

It is an arithmetic number, because the mean of its divisors is an integer number (12654325).

Almost surely, 2^25308649 is an apocalyptic number.

It is an amenable number.

25308649 is a deficient number, since it is larger than the sum of its proper divisors (1).

25308649 is an equidigital number, since it uses as much as digits as its factorization.

25308649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 51840, while the sum is 37.

The square root of 25308649 is about 5030.7702193601. The cubic root of 25308649 is about 293.6001823026.

The spelling of 25308649 in words is "twenty-five million, three hundred eight thousand, six hundred forty-nine".