25940729 has 2 divisors, whose sum is σ = 25940730. Its totient is φ = 25940728.

The previous prime is 25940701. The next prime is 25940731. The reversal of 25940729 is 92704952.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24730729 + 1210000 = 4973^2 + 1100^2 .

It is a cyclic number.

It is not a de Polignac number, because 25940729 - 2¹⁶ = 25875193 is a prime.

Together with 25940731, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 25940692 and 25940701.

It is not a weakly prime, because it can be changed into another prime (25940749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12970364 + 12970365.

It is an arithmetic number, because the mean of its divisors is an integer number (12970365).

Almost surely, 2^25940729 is an apocalyptic number.

It is an amenable number.

25940729 is a deficient number, since it is larger than the sum of its proper divisors (1).

25940729 is an equidigital number, since it uses as much as digits as its factorization.

25940729 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 25940729 is about 5093.2041977521. The cubic root of 25940729 is about 296.0243200434.

The spelling of 25940729 in words is "twenty-five million, nine hundred forty thousand, seven hundred twenty-nine".