54685919 has 2 divisors, whose sum is σ = 54685920. Its totient is φ = 54685918.

The previous prime is 54685907. The next prime is 54685921. The reversal of 54685919 is 91958645.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 54685919 - 2⁸ = 54685663 is a prime.

It is a super-2 number, since 2×54685919² = 5981099473749122, which contains 22 as substring.

Together with 54685921, 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 (54685949) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27342959 + 27342960.

It is an arithmetic number, because the mean of its divisors is an integer number (27342960).

Almost surely, 2^54685919 is an apocalyptic number.

54685919 is a deficient number, since it is larger than the sum of its proper divisors (1).

54685919 is an equidigital number, since it uses as much as digits as its factorization.

54685919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 388800, while the sum is 47.

The square root of 54685919 is about 7394.9928329918. The cubic root of 54685919 is about 379.5699636609.

The spelling of 54685919 in words is "fifty-four million, six hundred eighty-five thousand, nine hundred nineteen".