25430813 has 2 divisors, whose sum is σ = 25430814. Its totient is φ = 25430812.

The previous prime is 25430809. The next prime is 25430833. The reversal of 25430813 is 31803452.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22534009 + 2896804 = 4747^2 + 1702^2 .

It is a cyclic number.

It is not a de Polignac number, because 25430813 - 2² = 25430809 is a prime.

It is a super-3 number, since 3×25430813³ (a number of 23 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25430833) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12715406 + 12715407.

It is an arithmetic number, because the mean of its divisors is an integer number (12715407).

Almost surely, 2^25430813 is an apocalyptic number.

It is an amenable number.

25430813 is a deficient number, since it is larger than the sum of its proper divisors (1).

25430813 is an equidigital number, since it uses as much as digits as its factorization.

25430813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 25430813 is about 5042.8972823170. The cubic root of 25430813 is about 294.0718236603.

The spelling of 25430813 in words is "twenty-five million, four hundred thirty thousand, eight hundred thirteen".