54778469 has 2 divisors, whose sum is σ = 54778470. Its totient is φ = 54778468.

The previous prime is 54778447. The next prime is 54778483. The reversal of 54778469 is 96487745.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34869025 + 19909444 = 5905^2 + 4462^2 .

It is a cyclic number.

It is not a de Polignac number, because 54778469 - 2²⁴ = 38001253 is a prime.

It is a super-2 number, since 2×54778469² = 6001361331967922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (54778439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27389234 + 27389235.

It is an arithmetic number, because the mean of its divisors is an integer number (27389235).

Almost surely, 2^54778469 is an apocalyptic number.

It is an amenable number.

54778469 is a deficient number, since it is larger than the sum of its proper divisors (1).

54778469 is an equidigital number, since it uses as much as digits as its factorization.

54778469 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1693440, while the sum is 50.

The square root of 54778469 is about 7401.2478002023. The cubic root of 54778469 is about 379.7839700080.

The spelling of 54778469 in words is "fifty-four million, seven hundred seventy-eight thousand, four hundred sixty-nine".