54668981 has 4 divisors (see below), whose sum is σ = 54684000. Its totient is φ = 54653964.

The previous prime is 54668963. The next prime is 54668983. The reversal of 54668981 is 18986645.

54668981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 54668981 - 2¹⁸ = 54406837 is a prime.

It is a super-2 number, since 2×54668981² = 5977394967156722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54668983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1790 + ... + 10608.

It is an arithmetic number, because the mean of its divisors is an integer number (13671000).

Almost surely, 2^54668981 is an apocalyptic number.

It is an amenable number.

54668981 is a deficient number, since it is larger than the sum of its proper divisors (15019).

54668981 is an equidigital number, since it uses as much as digits as its factorization.

54668981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15018.

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

The square root of 54668981 is about 7393.8475099234. The cubic root of 54668981 is about 379.5307712445.

The spelling of 54668981 in words is "fifty-four million, six hundred sixty-eight thousand, nine hundred eighty-one".