25538789 has 2 divisors, whose sum is σ = 25538790. Its totient is φ = 25538788.

The previous prime is 25538753. The next prime is 25538797. The reversal of 25538789 is 98783552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24453025 + 1085764 = 4945^2 + 1042^2 .

It is a cyclic number.

It is not a de Polignac number, because 25538789 - 2¹² = 25534693 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25558789) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12769394 + 12769395.

It is an arithmetic number, because the mean of its divisors is an integer number (12769395).

Almost surely, 2^25538789 is an apocalyptic number.

It is an amenable number.

25538789 is a deficient number, since it is larger than the sum of its proper divisors (1).

25538789 is an equidigital number, since it uses as much as digits as its factorization.

25538789 is an evil number, because the sum of its binary digits is even.

The product of its digits is 604800, while the sum is 47.

The square root of 25538789 is about 5053.5916930437. The cubic root of 25538789 is about 294.4874332023.

The spelling of 25538789 in words is "twenty-five million, five hundred thirty-eight thousand, seven hundred eighty-nine".