54139403 has 4 divisors (see below), whose sum is σ = 55057080. Its totient is φ = 53221728.

The previous prime is 54139381. The next prime is 54139439. The reversal of 54139403 is 30493145.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30493145 = 5 ⋅6098629.

It is a cyclic number.

It is not a de Polignac number, because 54139403 - 2¹⁸ = 53877259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (54139003) 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, 458750 + ... + 458867.

It is an arithmetic number, because the mean of its divisors is an integer number (13764270).

Almost surely, 2^54139403 is an apocalyptic number.

54139403 is a deficient number, since it is larger than the sum of its proper divisors (917677).

54139403 is an equidigital number, since it uses as much as digits as its factorization.

54139403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 917676.

The product of its (nonzero) digits is 6480, while the sum is 29.

The square root of 54139403 is about 7357.9482873964. The cubic root of 54139403 is about 378.3012887701.

The spelling of 54139403 in words is "fifty-four million, one hundred thirty-nine thousand, four hundred three".