7669 has 2 divisors, whose sum is σ = 7670.
Its totient is φ = 7668.
The previous prime is 7649. The next prime is 7673. The reversal of 7669 is 9667.
7669 = T70 + T71 +
It is a strong prime.
It can be written as a sum of positive squares in only one way, i.e., 7569 + 100 = 87^2 + 10^2
It is a cyclic number.
It is not a de Polignac number, because 7669 - 27 = 7541 is a prime.
It is a super-2 number, since 2×76692 = 117627122, 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 (7639) by changing a digit.
It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3834 + 3835.
It is an arithmetic number, because the mean of its divisors is an integer number (3835).
27669 is an apocalyptic number.
7669 is the 72-nd centered triangular number.
It is an amenable number.
7669 is a deficient number, since it is larger than the sum of its proper divisors (1).
7669 is an equidigital number, since it uses as much as digits as its factorization.
7669 is an evil number, because the sum of its binary digits is even.
The product of its digits is 2268, while the sum is 28.
The square root of 7669 is about 87.5728268357.
The cubic root of 7669 is about 19.7202725339.
It can be divided in two parts, 7 and 669, that added together give a palindrome (676).
The spelling of 7669 in words is "seven thousand, six hundred sixty-nine".