53728537 has 2 divisors, whose sum is σ = 53728538. Its totient is φ = 53728536.

The previous prime is 53728531. The next prime is 53728541. The reversal of 53728537 is 73582735.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40398736 + 13329801 = 6356^2 + 3651^2 .

It is a cyclic number.

It is not a de Polignac number, because 53728537 - 2¹¹ = 53726489 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53728537.

It is not a weakly prime, because it can be changed into another prime (53728531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26864268 + 26864269.

It is an arithmetic number, because the mean of its divisors is an integer number (26864269).

Almost surely, 2^53728537 is an apocalyptic number.

It is an amenable number.

53728537 is a deficient number, since it is larger than the sum of its proper divisors (1).

53728537 is an equidigital number, since it uses as much as digits as its factorization.

53728537 is an evil number, because the sum of its binary digits is even.

The product of its digits is 176400, while the sum is 40.

The square root of 53728537 is about 7329.9752387031. The cubic root of 53728537 is about 377.3418766734.

The spelling of 53728537 in words is "fifty-three million, seven hundred twenty-eight thousand, five hundred thirty-seven".