54173891 has 4 divisors (see below), whose sum is σ = 54400800. Its totient is φ = 53946984.

The previous prime is 54173887. The next prime is 54173893. The reversal of 54173891 is 19837145.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19837145 = 5 ⋅3967429.

It is a cyclic number.

It is not a de Polignac number, because 54173891 - 2² = 54173887 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54173893) 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, 113096 + ... + 113573.

It is an arithmetic number, because the mean of its divisors is an integer number (13600200).

Almost surely, 2^54173891 is an apocalyptic number.

54173891 is a deficient number, since it is larger than the sum of its proper divisors (226909).

54173891 is a wasteful number, since it uses less digits than its factorization.

54173891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226908.

The product of its digits is 30240, while the sum is 38.

The square root of 54173891 is about 7360.2915023795. The cubic root of 54173891 is about 378.3816004884.

The spelling of 54173891 in words is "fifty-four million, one hundred seventy-three thousand, eight hundred ninety-one".