25755997 has 2 divisors, whose sum is σ = 25755998. Its totient is φ = 25755996.

The previous prime is 25755949. The next prime is 25756019. The reversal of 25755997 is 79955752.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22410756 + 3345241 = 4734^2 + 1829^2 .

It is a cyclic number.

It is not a de Polignac number, because 25755997 - 2⁷ = 25755869 is a prime.

It is a Chen prime.

It is a nialpdrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 25755997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25755497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12877998 + 12877999.

It is an arithmetic number, because the mean of its divisors is an integer number (12877999).

Almost surely, 2^25755997 is an apocalyptic number.

It is an amenable number.

25755997 is a deficient number, since it is larger than the sum of its proper divisors (1).

25755997 is an equidigital number, since it uses as much as digits as its factorization.

25755997 is an evil number, because the sum of its binary digits is even.

The product of its digits is 992250, while the sum is 49.

The square root of 25755997 is about 5075.0366501140. The cubic root of 25755997 is about 295.3199516256.

The spelling of 25755997 in words is "twenty-five million, seven hundred fifty-five thousand, nine hundred ninety-seven".