25678577 has 2 divisors, whose sum is σ = 25678578. Its totient is φ = 25678576.

The previous prime is 25678573. The next prime is 25678579. The reversal of 25678577 is 77587652.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 16654561 + 9024016 = 4081^2 + 3004^2 .

It is a cyclic number.

It is not a de Polignac number, because 25678577 - 2² = 25678573 is a prime.

Together with 25678579, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (25678573) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12839288 + 12839289.

It is an arithmetic number, because the mean of its divisors is an integer number (12839289).

Almost surely, 2^25678577 is an apocalyptic number.

It is an amenable number.

25678577 is a deficient number, since it is larger than the sum of its proper divisors (1).

25678577 is an equidigital number, since it uses as much as digits as its factorization.

25678577 is an evil number, because the sum of its binary digits is even.

The product of its digits is 823200, while the sum is 47.

The square root of 25678577 is about 5067.4033784573. The cubic root of 25678577 is about 295.0237537131.

The spelling of 25678577 in words is "twenty-five million, six hundred seventy-eight thousand, five hundred seventy-seven".