54638669 has 4 divisors (see below), whose sum is σ = 54986844. Its totient is φ = 54290496.

The previous prime is 54638653. The next prime is 54638671. The reversal of 54638669 is 96683645.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17123044 + 37515625 = 4138^2 + 6125^2 .

It is a cyclic number.

It is not a de Polignac number, because 54638669 - 2⁴ = 54638653 is a prime.

It is a super-2 number, since 2×54638669² = 5970768300183122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54638069) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 173852 + ... + 174165.

It is an arithmetic number, because the mean of its divisors is an integer number (13746711).

Almost surely, 2^54638669 is an apocalyptic number.

It is an amenable number.

54638669 is a deficient number, since it is larger than the sum of its proper divisors (348175).

54638669 is a wasteful number, since it uses less digits than its factorization.

54638669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 348174.

The product of its digits is 933120, while the sum is 47.

The square root of 54638669 is about 7391.7974133495. The cubic root of 54638669 is about 379.4606128510.

The spelling of 54638669 in words is "fifty-four million, six hundred thirty-eight thousand, six hundred sixty-nine".