25430789 has 2 divisors, whose sum is σ = 25430790. Its totient is φ = 25430788.

The previous prime is 25430777. The next prime is 25430809. The reversal of 25430789 is 98703452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25421764 + 9025 = 5042^2 + 95^2 .

It is a cyclic number.

It is not a de Polignac number, because 25430789 - 2⁴ = 25430773 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25430719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12715394 + 12715395.

It is an arithmetic number, because the mean of its divisors is an integer number (12715395).

Almost surely, 2^25430789 is an apocalyptic number.

It is an amenable number.

25430789 is a deficient number, since it is larger than the sum of its proper divisors (1).

25430789 is an equidigital number, since it uses as much as digits as its factorization.

25430789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 25430789 is about 5042.8949027320. The cubic root of 25430789 is about 294.0717311515.

The spelling of 25430789 in words is "twenty-five million, four hundred thirty thousand, seven hundred eighty-nine".