53506729 has 2 divisors, whose sum is σ = 53506730. Its totient is φ = 53506728.

The previous prime is 53506709. The next prime is 53506753. The reversal of 53506729 is 92760535.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50694400 + 2812329 = 7120^2 + 1677^2 .

It is a cyclic number.

It is not a de Polignac number, because 53506729 - 2⁷ = 53506601 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53506709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26753364 + 26753365.

It is an arithmetic number, because the mean of its divisors is an integer number (26753365).

Almost surely, 2^53506729 is an apocalyptic number.

It is an amenable number.

53506729 is a deficient number, since it is larger than the sum of its proper divisors (1).

53506729 is an equidigital number, since it uses as much as digits as its factorization.

53506729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 56700, while the sum is 37.

The square root of 53506729 is about 7314.8293896714. The cubic root of 53506729 is about 376.8218991912.

The spelling of 53506729 in words is "fifty-three million, five hundred six thousand, seven hundred twenty-nine".