53669 has 16 divisors (see below), whose sum is σ = 72576. Its totient is φ = 38400.

The previous prime is 53657. The next prime is 53681. The reversal of 53669 is 96635.

53669 = 22² + 23² + ... + 55².

53669 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (53657) and next prime (53681).

It is a cyclic number.

It is not a de Polignac number, because 53669 - 2⁴ = 53653 is a prime.

It is a super-2 number, since 2×53669² = 5760723122, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1289 + ... + 1329.

It is an arithmetic number, because the mean of its divisors is an integer number (4536).

2⁵³⁶⁶⁹ is an apocalyptic number.

It is an amenable number.

53669 is a deficient number, since it is larger than the sum of its proper divisors (18907).

53669 is a wasteful number, since it uses less digits than its factorization.

53669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76.

The product of its digits is 4860, while the sum is 29.

The square root of 53669 is about 231.6657074321. The cubic root of 53669 is about 37.7202446693.

The spelling of 53669 in words is "fifty-three thousand, six hundred sixty-nine".