63728297 has 2 divisors, whose sum is σ = 63728298. Its totient is φ = 63728296.

The previous prime is 63728293. The next prime is 63728311. The reversal of 63728297 is 79282736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63186601 + 541696 = 7949^2 + 736^2 .

It is a cyclic number.

It is not a de Polignac number, because 63728297 - 2² = 63728293 is a prime.

It is a super-2 number, since 2×63728297² = 8122591677040418, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (63728293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31864148 + 31864149.

It is an arithmetic number, because the mean of its divisors is an integer number (31864149).

Almost surely, 2^63728297 is an apocalyptic number.

It is an amenable number.

63728297 is a deficient number, since it is larger than the sum of its proper divisors (1).

63728297 is an equidigital number, since it uses as much as digits as its factorization.

63728297 is an evil number, because the sum of its binary digits is even.

The product of its digits is 254016, while the sum is 44.

The square root of 63728297 is about 7983.0005010647. Note that the first 3 decimals coincide. The cubic root of 63728297 is about 399.4331491631.

The spelling of 63728297 in words is "sixty-three million, seven hundred twenty-eight thousand, two hundred ninety-seven".