53809997 has 2 divisors, whose sum is σ = 53809998. Its totient is φ = 53809996.

The previous prime is 53809969. The next prime is 53810047. The reversal of 53809997 is 79990835.

53809997 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an a-pointer prime, because the next prime (53810047) can be obtained adding 53809997 to its sum of digits (50).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53085796 + 724201 = 7286^2 + 851^2 .

It is a cyclic number.

It is not a de Polignac number, because 53809997 - 2⁶ = 53809933 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53809927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26904998 + 26904999.

It is an arithmetic number, because the mean of its divisors is an integer number (26904999).

Almost surely, 2^53809997 is an apocalyptic number.

It is an amenable number.

53809997 is a deficient number, since it is larger than the sum of its proper divisors (1).

53809997 is an equidigital number, since it uses as much as digits as its factorization.

53809997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 612360, while the sum is 50.

The square root of 53809997 is about 7335.5297695531. The cubic root of 53809997 is about 377.5324814529.

The spelling of 53809997 in words is "fifty-three million, eight hundred nine thousand, nine hundred ninety-seven".