63728849 has 2 divisors, whose sum is σ = 63728850. Its totient is φ = 63728848.

The previous prime is 63728827. The next prime is 63728887. The reversal of 63728849 is 94882736.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48205249 + 15523600 = 6943^2 + 3940^2 .

It is a cyclic number.

It is not a de Polignac number, because 63728849 - 2⁸ = 63728593 is a prime.

It is a super-2 number, since 2×63728849² = 8122732389729602, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (63728809) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31864424 + 31864425.

It is an arithmetic number, because the mean of its divisors is an integer number (31864425).

Almost surely, 2^63728849 is an apocalyptic number.

It is an amenable number.

63728849 is a deficient number, since it is larger than the sum of its proper divisors (1).

63728849 is an equidigital number, since it uses as much as digits as its factorization.

63728849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 47.

The square root of 63728849 is about 7983.0350744563. The cubic root of 63728849 is about 399.4343024261.

The spelling of 63728849 in words is "sixty-three million, seven hundred twenty-eight thousand, eight hundred forty-nine".