25769749 has 2 divisors, whose sum is σ = 25769750. Its totient is φ = 25769748.

The previous prime is 25769747. The next prime is 25769759. The reversal of 25769749 is 94796752.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19864849 + 5904900 = 4457^2 + 2430^2 .

It is a cyclic number.

It is not a de Polignac number, because 25769749 - 2¹ = 25769747 is a prime.

Together with 25769747, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25769747) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12884874 + 12884875.

It is an arithmetic number, because the mean of its divisors is an integer number (12884875).

Almost surely, 2^25769749 is an apocalyptic number.

It is an amenable number.

25769749 is a deficient number, since it is larger than the sum of its proper divisors (1).

25769749 is an equidigital number, since it uses as much as digits as its factorization.

25769749 is an evil number, because the sum of its binary digits is even.

The product of its digits is 952560, while the sum is 49.

The square root of 25769749 is about 5076.3913363727. The cubic root of 25769749 is about 295.3725027185.

The spelling of 25769749 in words is "twenty-five million, seven hundred sixty-nine thousand, seven hundred forty-nine".