54999993 has 4 divisors (see below), whose sum is σ = 73333328. Its totient is φ = 36666660.

The previous prime is 54999943. The next prime is 55000013. The reversal of 54999993 is 39999945.

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.

It is not a de Polignac number, because 54999993 - 2⁶ = 54999929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54999943) 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, 9166663 + ... + 9166668.

It is an arithmetic number, because the mean of its divisors is an integer number (18333332).

Almost surely, 2^54999993 is an apocalyptic number.

It is an amenable number.

54999993 is a deficient number, since it is larger than the sum of its proper divisors (18333335).

54999993 is a wasteful number, since it uses less digits than its factorization.

54999993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18333334.

The product of its digits is 3542940, while the sum is 57.

The square root of 54999993 is about 7416.1980151557. The cubic root of 54999993 is about 380.2952299424.

The spelling of 54999993 in words is "fifty-four million, nine hundred ninety-nine thousand, nine hundred ninety-three".