53779309 has 2 divisors, whose sum is σ = 53779310. Its totient is φ = 53779308.

The previous prime is 53779301. The next prime is 53779333. The reversal of 53779309 is 90397735.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53144100 + 635209 = 7290^2 + 797^2 .

It is a cyclic number.

It is not a de Polignac number, because 53779309 - 2³ = 53779301 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53779301) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26889654 + 26889655.

It is an arithmetic number, because the mean of its divisors is an integer number (26889655).

Almost surely, 2^53779309 is an apocalyptic number.

It is an amenable number.

53779309 is a deficient number, since it is larger than the sum of its proper divisors (1).

53779309 is an equidigital number, since it uses as much as digits as its factorization.

53779309 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 178605, while the sum is 43.

The square root of 53779309 is about 7333.4377341053. The cubic root of 53779309 is about 377.4606985092.

The spelling of 53779309 in words is "fifty-three million, seven hundred seventy-nine thousand, three hundred nine".