53809447 has 2 divisors, whose sum is σ = 53809448. Its totient is φ = 53809446.

The previous prime is 53809439. The next prime is 53809453. The reversal of 53809447 is 74490835.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 53809447 - 2³ = 53809439 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53809247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26904723 + 26904724.

It is an arithmetic number, because the mean of its divisors is an integer number (26904724).

Almost surely, 2^53809447 is an apocalyptic number.

53809447 is a deficient number, since it is larger than the sum of its proper divisors (1).

53809447 is an equidigital number, since it uses as much as digits as its factorization.

53809447 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The square root of 53809447 is about 7335.4922806857. The cubic root of 53809447 is about 377.5311951766.

The spelling of 53809447 in words is "fifty-three million, eight hundred nine thousand, four hundred forty-seven".