54093991 has 12 divisors (see below), whose sum is σ = 63868728. Its totient is φ = 45671472.

The previous prime is 54093967. The next prime is 54093997. The reversal of 54093991 is 19939045.

It is not a de Polignac number, because 54093991 - 2¹⁷ = 53962919 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54093997) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4956 + ... + 11521.

It is an arithmetic number, because the mean of its divisors is an integer number (5322394).

Almost surely, 2^54093991 is an apocalyptic number.

54093991 is a deficient number, since it is larger than the sum of its proper divisors (9774737).

54093991 is a wasteful number, since it uses less digits than its factorization.

54093991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16558 (or 16551 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 40.

The square root of 54093991 is about 7354.8617254167. The cubic root of 54093991 is about 378.1954864477.

The spelling of 54093991 in words is "fifty-four million, ninety-three thousand, nine hundred ninety-one".