25387829 has 2 divisors, whose sum is σ = 25387830. Its totient is φ = 25387828.

The previous prime is 25387811. The next prime is 25387889. The reversal of 25387829 is 92878352.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19272100 + 6115729 = 4390^2 + 2473^2 .

It is a cyclic number.

It is not a de Polignac number, because 25387829 - 2¹² = 25383733 is a prime.

It is a super-2 number, since 2×25387829² = 1289083722666482, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25387829.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25387889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12693914 + 12693915.

It is an arithmetic number, because the mean of its divisors is an integer number (12693915).

Almost surely, 2^25387829 is an apocalyptic number.

It is an amenable number.

25387829 is a deficient number, since it is larger than the sum of its proper divisors (1).

25387829 is an equidigital number, since it uses as much as digits as its factorization.

25387829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 44.

The square root of 25387829 is about 5038.6336441539. The cubic root of 25387829 is about 293.9060469220.

The spelling of 25387829 in words is "twenty-five million, three hundred eighty-seven thousand, eight hundred twenty-nine".