25719877 has 2 divisors, whose sum is σ = 25719878. Its totient is φ = 25719876.

The previous prime is 25719853. The next prime is 25719923. The reversal of 25719877 is 77891752.

It is an a-pointer prime, because the next prime (25719923) can be obtained adding 25719877 to its sum of digits (46).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23872996 + 1846881 = 4886^2 + 1359^2 .

It is a cyclic number.

It is not a de Polignac number, because 25719877 - 2²³ = 17331269 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25719077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12859938 + 12859939.

It is an arithmetic number, because the mean of its divisors is an integer number (12859939).

Almost surely, 2^25719877 is an apocalyptic number.

It is an amenable number.

25719877 is a deficient number, since it is larger than the sum of its proper divisors (1).

25719877 is an equidigital number, since it uses as much as digits as its factorization.

25719877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 246960, while the sum is 46.

The square root of 25719877 is about 5071.4768066117. The cubic root of 25719877 is about 295.1818356111.

The spelling of 25719877 in words is "twenty-five million, seven hundred nineteen thousand, eight hundred seventy-seven".