54778319 has 2 divisors, whose sum is σ = 54778320. Its totient is φ = 54778318.

The previous prime is 54778307. The next prime is 54778327. The reversal of 54778319 is 91387745.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 54778319 - 2²⁰ = 53729743 is a prime.

It is a super-2 number, since 2×54778319² = 6001328464931522, which contains 22 as substring.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 54778319.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54778379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27389159 + 27389160.

It is an arithmetic number, because the mean of its divisors is an integer number (27389160).

Almost surely, 2^54778319 is an apocalyptic number.

54778319 is a deficient number, since it is larger than the sum of its proper divisors (1).

54778319 is an equidigital number, since it uses as much as digits as its factorization.

54778319 is an evil number, because the sum of its binary digits is even.

The product of its digits is 211680, while the sum is 44.

The square root of 54778319 is about 7401.2376667690. The cubic root of 54778319 is about 379.7836233533.

The spelling of 54778319 in words is "fifty-four million, seven hundred seventy-eight thousand, three hundred nineteen".