25693669 has 2 divisors, whose sum is σ = 25693670. Its totient is φ = 25693668.

The previous prime is 25693649. The next prime is 25693697. The reversal of 25693669 is 96639652.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23648769 + 2044900 = 4863^2 + 1430^2 .

It is a cyclic number.

It is not a de Polignac number, because 25693669 - 2⁷ = 25693541 is a prime.

It is a super-2 number, since 2×25693669² = 1320329253363122, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25693639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12846834 + 12846835.

It is an arithmetic number, because the mean of its divisors is an integer number (12846835).

Almost surely, 2^25693669 is an apocalyptic number.

It is an amenable number.

25693669 is a deficient number, since it is larger than the sum of its proper divisors (1).

25693669 is an equidigital number, since it uses as much as digits as its factorization.

25693669 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 524880, while the sum is 46.

The square root of 25693669 is about 5068.8922853026. The cubic root of 25693669 is about 295.0815402289.

It can be divided in two parts, 25693 and 669, that added together give a palindrome (26362).

The spelling of 25693669 in words is "twenty-five million, six hundred ninety-three thousand, six hundred sixty-nine".