53720839 has 2 divisors, whose sum is σ = 53720840. Its totient is φ = 53720838.

The previous prime is 53720827. The next prime is 53720899. The reversal of 53720839 is 93802735.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 53720839 - 2¹³ = 53712647 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 53720798 and 53720807.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53720899) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26860419 + 26860420.

It is an arithmetic number, because the mean of its divisors is an integer number (26860420).

Almost surely, 2^53720839 is an apocalyptic number.

53720839 is a deficient number, since it is larger than the sum of its proper divisors (1).

53720839 is an equidigital number, since it uses as much as digits as its factorization.

53720839 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 53720839 is about 7329.4501158000. The cubic root of 53720839 is about 377.3238544909.

The spelling of 53720839 in words is "fifty-three million, seven hundred twenty thousand, eight hundred thirty-nine".