54405139 has 8 divisors (see below), whose sum is σ = 56157120. Its totient is φ = 52680936.

The previous prime is 54405121. The next prime is 54405163. The reversal of 54405139 is 93150445.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 54405139 - 2⁹ = 54404627 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 54405139.

It is not an unprimeable number, because it can be changed into a prime (54405199) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2929 + ... + 10834.

It is an arithmetic number, because the mean of its divisors is an integer number (7019640).

Almost surely, 2^54405139 is an apocalyptic number.

54405139 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

54405139 is a deficient number, since it is larger than the sum of its proper divisors (1751981).

54405139 is a wasteful number, since it uses less digits than its factorization.

54405139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13889.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 54405139 is about 7375.9839343643. The cubic root of 54405139 is about 378.9192258993.

The spelling of 54405139 in words is "fifty-four million, four hundred five thousand, one hundred thirty-nine".