25478077 has 2 divisors, whose sum is σ = 25478078. Its totient is φ = 25478076.

The previous prime is 25478051. The next prime is 25478081. The reversal of 25478077 is 77087452.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14791716 + 10686361 = 3846^2 + 3269^2 .

It is a cyclic number.

It is not a de Polignac number, because 25478077 - 2²³ = 17089469 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25478777) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12739038 + 12739039.

It is an arithmetic number, because the mean of its divisors is an integer number (12739039).

Almost surely, 2^25478077 is an apocalyptic number.

It is an amenable number.

25478077 is a deficient number, since it is larger than the sum of its proper divisors (1).

25478077 is an equidigital number, since it uses as much as digits as its factorization.

25478077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 109760, while the sum is 40.

The square root of 25478077 is about 5047.5813019703. The cubic root of 25478077 is about 294.2538916234.

The spelling of 25478077 in words is "twenty-five million, four hundred seventy-eight thousand, seventy-seven".