54115639 has 2 divisors, whose sum is σ = 54115640. Its totient is φ = 54115638.

The previous prime is 54115631. The next prime is 54115643. The reversal of 54115639 is 93651145.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 54115639 - 2³ = 54115631 is a prime.

It is a super-3 number, since 3×54115639³ (a number of 24 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54115631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27057819 + 27057820.

It is an arithmetic number, because the mean of its divisors is an integer number (27057820).

Almost surely, 2^54115639 is an apocalyptic number.

54115639 is a deficient number, since it is larger than the sum of its proper divisors (1).

54115639 is an equidigital number, since it uses as much as digits as its factorization.

54115639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 34.

The square root of 54115639 is about 7356.3332578126. Note that the first 3 decimals coincide. The cubic root of 54115639 is about 378.2459300295.

The spelling of 54115639 in words is "fifty-four million, one hundred fifteen thousand, six hundred thirty-nine".