25628791 has 2 divisors, whose sum is σ = 25628792. Its totient is φ = 25628790.

The previous prime is 25628789. The next prime is 25628797. The reversal of 25628791 is 19782652.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25628791 - 2¹ = 25628789 is a prime.

Together with 25628789, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25628797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12814395 + 12814396.

It is an arithmetic number, because the mean of its divisors is an integer number (12814396).

Almost surely, 2^25628791 is an apocalyptic number.

25628791 is a deficient number, since it is larger than the sum of its proper divisors (1).

25628791 is an equidigital number, since it uses as much as digits as its factorization.

25628791 is an evil number, because the sum of its binary digits is even.

The product of its digits is 60480, while the sum is 40.

The square root of 25628791 is about 5062.4886172712. The cubic root of 25628791 is about 294.8329649048.

The spelling of 25628791 in words is "twenty-five million, six hundred twenty-eight thousand, seven hundred ninety-one".