53721359 has 2 divisors, whose sum is σ = 53721360. Its totient is φ = 53721358.

The previous prime is 53721347. The next prime is 53721361. The reversal of 53721359 is 95312735.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53721359 is a prime.

Together with 53721361, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53721559) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26860679 + 26860680.

It is an arithmetic number, because the mean of its divisors is an integer number (26860680).

Almost surely, 2^53721359 is an apocalyptic number.

53721359 is a deficient number, since it is larger than the sum of its proper divisors (1).

53721359 is an equidigital number, since it uses as much as digits as its factorization.

53721359 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28350, while the sum is 35.

The square root of 53721359 is about 7329.4855890437. The cubic root of 53721359 is about 377.3250719437.

The spelling of 53721359 in words is "fifty-three million, seven hundred twenty-one thousand, three hundred fifty-nine".