53688669 has 8 divisors (see below), whose sum is σ = 75795840. Its totient is φ = 33686976.

The previous prime is 53688659. The next prime is 53688697. The reversal of 53688669 is 96688635.

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

It is not a de Polignac number, because 53688669 - 2⁸ = 53688413 is a prime.

It is a super-2 number, since 2×53688669² = 5764946357983122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51), and also a Moran number because the ratio is a prime number: 1052719 = 53688669 / (5 + 3 + 6 + 8 + 8 + 6 + 6 + 9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53688619) 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, 526309 + ... + 526410.

It is an arithmetic number, because the mean of its divisors is an integer number (9474480).

Almost surely, 2^53688669 is an apocalyptic number.

It is an amenable number.

53688669 is a deficient number, since it is larger than the sum of its proper divisors (22107171).

53688669 is a wasteful number, since it uses less digits than its factorization.

53688669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052739.

The product of its digits is 1866240, while the sum is 51.

The square root of 53688669 is about 7327.2552159728. The cubic root of 53688669 is about 377.2485210174.

The spelling of 53688669 in words is "fifty-three million, six hundred eighty-eight thousand, six hundred sixty-nine".