54399999 has 4 divisors (see below), whose sum is σ = 72533336. Its totient is φ = 36266664.

The previous prime is 54399997. The next prime is 54400039. The reversal of 54399999 is 99999345.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 54399999 - 2¹ = 54399997 is a prime.

It is a Duffinian number.

54399999 is a modest number, since divided by 9999 gives 5439 as remainder.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (54399997) 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, 9066664 + ... + 9066669.

It is an arithmetic number, because the mean of its divisors is an integer number (18133334).

Almost surely, 2^54399999 is an apocalyptic number.

54399999 is a deficient number, since it is larger than the sum of its proper divisors (18133337).

54399999 is a wasteful number, since it uses less digits than its factorization.

54399999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18133336.

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

The square root of 54399999 is about 7375.6354980435. The cubic root of 54399999 is about 378.9072925526.

The spelling of 54399999 in words is "fifty-four million, three hundred ninety-nine thousand, nine hundred ninety-nine".