25143389 has 2 divisors, whose sum is σ = 25143390. Its totient is φ = 25143388.

The previous prime is 25143379. The next prime is 25143413. The reversal of 25143389 is 98334152.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22944100 + 2199289 = 4790^2 + 1483^2 .

It is a cyclic number.

It is not a de Polignac number, because 25143389 - 2⁸ = 25143133 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25143329) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12571694 + 12571695.

It is an arithmetic number, because the mean of its divisors is an integer number (12571695).

Almost surely, 2^25143389 is an apocalyptic number.

It is an amenable number.

25143389 is a deficient number, since it is larger than the sum of its proper divisors (1).

25143389 is an equidigital number, since it uses as much as digits as its factorization.

25143389 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 25143389 is about 5014.3183983469. The cubic root of 25143389 is about 292.9597377378.

The spelling of 25143389 in words is "twenty-five million, one hundred forty-three thousand, three hundred eighty-nine".