25577597 has 2 divisors, whose sum is σ = 25577598. Its totient is φ = 25577596.

The previous prime is 25577579. The next prime is 25577599. The reversal of 25577597 is 79577552.

Together with previous prime (25577579) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 19456921 + 6120676 = 4411^2 + 2474^2 .

It is a cyclic number.

It is not a de Polignac number, because 25577597 - 2¹² = 25573501 is a prime.

Together with 25577599, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25577599) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12788798 + 12788799.

It is an arithmetic number, because the mean of its divisors is an integer number (12788799).

Almost surely, 2^25577597 is an apocalyptic number.

It is an amenable number.

25577597 is a deficient number, since it is larger than the sum of its proper divisors (1).

25577597 is an equidigital number, since it uses as much as digits as its factorization.

25577597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 771750, while the sum is 47.

The square root of 25577597 is about 5057.4298808782. The cubic root of 25577597 is about 294.6365225529.

The spelling of 25577597 in words is "twenty-five million, five hundred seventy-seven thousand, five hundred ninety-seven".