63898481 has 2 divisors, whose sum is σ = 63898482. Its totient is φ = 63898480.

The previous prime is 63898469. The next prime is 63898489. The reversal of 63898481 is 18489836.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 57138481 + 6760000 = 7559^2 + 2600^2 .

It is a cyclic number.

It is not a de Polignac number, because 63898481 - 2¹⁴ = 63882097 is a prime.

It is a super-2 number, since 2×63898481² = 8166031748214722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63898489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31949240 + 31949241.

It is an arithmetic number, because the mean of its divisors is an integer number (31949241).

Almost surely, 2^63898481 is an apocalyptic number.

It is an amenable number.

63898481 is a deficient number, since it is larger than the sum of its proper divisors (1).

63898481 is an equidigital number, since it uses as much as digits as its factorization.

63898481 is an evil number, because the sum of its binary digits is even.

The product of its digits is 331776, while the sum is 47.

The square root of 63898481 is about 7993.6525443629. The cubic root of 63898481 is about 399.7883901563.

The spelling of 63898481 in words is "sixty-three million, eight hundred ninety-eight thousand, four hundred eighty-one".