25613603 has 2 divisors, whose sum is σ = 25613604. Its totient is φ = 25613602.

The previous prime is 25613591. The next prime is 25613633. The reversal of 25613603 is 30631652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25613603 - 2⁴ = 25613587 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (25613633) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12806801 + 12806802.

It is an arithmetic number, because the mean of its divisors is an integer number (12806802).

Almost surely, 2^25613603 is an apocalyptic number.

25613603 is a deficient number, since it is larger than the sum of its proper divisors (1).

25613603 is an equidigital number, since it uses as much as digits as its factorization.

25613603 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 25613603 is about 5060.9883422114. The cubic root of 25613603 is about 294.7747126067.

The spelling of 25613603 in words is "twenty-five million, six hundred thirteen thousand, six hundred three".