54685391 has 2 divisors, whose sum is σ = 54685392. Its totient is φ = 54685390.

The previous prime is 54685381. The next prime is 54685417. The reversal of 54685391 is 19358645.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 54685391 - 2¹⁴ = 54669007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54685321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27342695 + 27342696.

It is an arithmetic number, because the mean of its divisors is an integer number (27342696).

Almost surely, 2^54685391 is an apocalyptic number.

54685391 is a deficient number, since it is larger than the sum of its proper divisors (1).

54685391 is an equidigital number, since it uses as much as digits as its factorization.

54685391 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 129600, while the sum is 41.

The square root of 54685391 is about 7394.9571330739. The cubic root of 54685391 is about 379.5687420571.

The spelling of 54685391 in words is "fifty-four million, six hundred eighty-five thousand, three hundred ninety-one".