53477729 has 2 divisors, whose sum is σ = 53477730. Its totient is φ = 53477728.

The previous prime is 53477719. The next prime is 53477731. The reversal of 53477729 is 92777435.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36626704 + 16851025 = 6052^2 + 4105^2 .

It is a cyclic number.

It is not a de Polignac number, because 53477729 - 2⁴ = 53477713 is a prime.

Together with 53477731, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53477729.

It is not a weakly prime, because it can be changed into another prime (53477719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26738864 + 26738865.

It is an arithmetic number, because the mean of its divisors is an integer number (26738865).

Almost surely, 2^53477729 is an apocalyptic number.

It is an amenable number.

53477729 is a deficient number, since it is larger than the sum of its proper divisors (1).

53477729 is an equidigital number, since it uses as much as digits as its factorization.

53477729 is an evil number, because the sum of its binary digits is even.

The product of its digits is 370440, while the sum is 44.

The square root of 53477729 is about 7312.8468464750. The cubic root of 53477729 is about 376.7538092511.

The spelling of 53477729 in words is "fifty-three million, four hundred seventy-seven thousand, seven hundred twenty-nine".