54699809 has 2 divisors, whose sum is σ = 54699810. Its totient is φ = 54699808.

The previous prime is 54699793. The next prime is 54699823. The reversal of 54699809 is 90899645.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51165409 + 3534400 = 7153^2 + 1880^2 .

It is a cyclic number.

It is not a de Polignac number, because 54699809 - 2⁴ = 54699793 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (54699889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27349904 + 27349905.

It is an arithmetic number, because the mean of its divisors is an integer number (27349905).

Almost surely, 2^54699809 is an apocalyptic number.

It is an amenable number.

54699809 is a deficient number, since it is larger than the sum of its proper divisors (1).

54699809 is an equidigital number, since it uses as much as digits as its factorization.

54699809 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 50.

The square root of 54699809 is about 7395.9319223476. The cubic root of 54699809 is about 379.6020973471.

The spelling of 54699809 in words is "fifty-four million, six hundred ninety-nine thousand, eight hundred nine".