54868691 has 4 divisors (see below), whose sum is σ = 55175400. Its totient is φ = 54561984.

The previous prime is 54868687. The next prime is 54868753. The reversal of 54868691 is 19686845.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19686845 = 5 ⋅3937369.

It is a cyclic number.

It is not a de Polignac number, because 54868691 - 2² = 54868687 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54868601) 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, 153086 + ... + 153443.

It is an arithmetic number, because the mean of its divisors is an integer number (13793850).

Almost surely, 2^54868691 is an apocalyptic number.

54868691 is a deficient number, since it is larger than the sum of its proper divisors (306709).

54868691 is a wasteful number, since it uses less digits than its factorization.

54868691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 306708.

The product of its digits is 414720, while the sum is 47.

The square root of 54868691 is about 7407.3403459001. The cubic root of 54868691 is about 379.9923613423.

The spelling of 54868691 in words is "fifty-four million, eight hundred sixty-eight thousand, six hundred ninety-one".