53669569 has 8 divisors (see below), whose sum is σ = 54727400. Its totient is φ = 52617600.

The previous prime is 53669537. The next prime is 53669593. The reversal of 53669569 is 96596635.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1468944 + 52200625 = 1212^2 + 7225^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 53669569 - 2⁵ = 53669537 is a prime.

It is a super-2 number, since 2×53669569² = 5760845273291522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53669599) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20029 + ... + 22549.

It is an arithmetic number, because the mean of its divisors is an integer number (6840925).

Almost surely, 2^53669569 is an apocalyptic number.

It is an amenable number.

53669569 is a deficient number, since it is larger than the sum of its proper divisors (1057831).

53669569 is a wasteful number, since it uses less digits than its factorization.

53669569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2931.

The product of its digits is 1312200, while the sum is 49.

The square root of 53669569 is about 7325.9517470428. The cubic root of 53669569 is about 377.2037797246.

The spelling of 53669569 in words is "fifty-three million, six hundred sixty-nine thousand, five hundred sixty-nine".