52520729 has 2 divisors, whose sum is σ = 52520730. Its totient is φ = 52520728.

The previous prime is 52520717. The next prime is 52520749. The reversal of 52520729 is 92702525.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35521600 + 16999129 = 5960^2 + 4123^2 .

It is a cyclic number.

It is not a de Polignac number, because 52520729 - 2⁸ = 52520473 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 52520695 and 52520704.

It is not a weakly prime, because it can be changed into another prime (52520749) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26260364 + 26260365.

It is an arithmetic number, because the mean of its divisors is an integer number (26260365).

Almost surely, 2^52520729 is an apocalyptic number.

It is an amenable number.

52520729 is a deficient number, since it is larger than the sum of its proper divisors (1).

52520729 is an equidigital number, since it uses as much as digits as its factorization.

52520729 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12600, while the sum is 32.

The square root of 52520729 is about 7247.1186688228. The cubic root of 52520729 is about 374.4928944114.

The spelling of 52520729 in words is "fifty-two million, five hundred twenty thousand, seven hundred twenty-nine".