54120839 has 2 divisors, whose sum is σ = 54120840. Its totient is φ = 54120838.

The previous prime is 54120827. The next prime is 54120841. The reversal of 54120839 is 93802145.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-54120839 is a prime.

Together with 54120841, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54120889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27060419 + 27060420.

It is an arithmetic number, because the mean of its divisors is an integer number (27060420).

Almost surely, 2^54120839 is an apocalyptic number.

54120839 is a deficient number, since it is larger than the sum of its proper divisors (1).

54120839 is an equidigital number, since it uses as much as digits as its factorization.

54120839 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 54120839 is about 7356.6866862739. The cubic root of 54120839 is about 378.2580449244.

The spelling of 54120839 in words is "fifty-four million, one hundred twenty thousand, eight hundred thirty-nine".