25767769 has 2 divisors, whose sum is σ = 25767770. Its totient is φ = 25767768.

The previous prime is 25767761. The next prime is 25767773. The reversal of 25767769 is 96776752.

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., 21715600 + 4052169 = 4660^2 + 2013^2 .

It is a cyclic number.

It is not a de Polignac number, because 25767769 - 2³ = 25767761 is a prime.

It is a super-2 number, since 2×25767769² = 1327955838474722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25767761) 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, 12883884 + 12883885.

It is an arithmetic number, because the mean of its divisors is an integer number (12883885).

Almost surely, 2^25767769 is an apocalyptic number.

It is an amenable number.

25767769 is a deficient number, since it is larger than the sum of its proper divisors (1).

25767769 is an equidigital number, since it uses as much as digits as its factorization.

25767769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1111320, while the sum is 49.

The square root of 25767769 is about 5076.1963122007. The cubic root of 25767769 is about 295.3649376140.

The spelling of 25767769 in words is "twenty-five million, seven hundred sixty-seven thousand, seven hundred sixty-nine".