53831909 has 2 divisors, whose sum is σ = 53831910. Its totient is φ = 53831908.

The previous prime is 53831881. The next prime is 53831963. The reversal of 53831909 is 90913835.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 33895684 + 19936225 = 5822^2 + 4465^2 .

It is a cyclic number.

It is not a de Polignac number, because 53831909 - 2⁸ = 53831653 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53831209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26915954 + 26915955.

It is an arithmetic number, because the mean of its divisors is an integer number (26915955).

Almost surely, 2^53831909 is an apocalyptic number.

It is an amenable number.

53831909 is a deficient number, since it is larger than the sum of its proper divisors (1).

53831909 is an equidigital number, since it uses as much as digits as its factorization.

53831909 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 29160, while the sum is 38.

The square root of 53831909 is about 7337.0231701965. The cubic root of 53831909 is about 377.5837195720.

The spelling of 53831909 in words is "fifty-three million, eight hundred thirty-one thousand, nine hundred nine".