63465881 has 2 divisors, whose sum is σ = 63465882. Its totient is φ = 63465880.

The previous prime is 63465877. The next prime is 63465889. The reversal of 63465881 is 18856436.

63465881 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 45104656 + 18361225 = 6716^2 + 4285^2 .

It is a cyclic number.

It is not a de Polignac number, because 63465881 - 2² = 63465877 is a prime.

It is a super-2 number, since 2×63465881² = 8055836102212322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (63465889) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31732940 + 31732941.

It is an arithmetic number, because the mean of its divisors is an integer number (31732941).

Almost surely, 2^63465881 is an apocalyptic number.

It is an amenable number.

63465881 is a deficient number, since it is larger than the sum of its proper divisors (1).

63465881 is an equidigital number, since it uses as much as digits as its factorization.

63465881 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 138240, while the sum is 41.

The square root of 63465881 is about 7966.5476211468. The cubic root of 63465881 is about 398.8841421310.

It can be divided in two parts, 63465 and 881, that added together give a palindrome (64346).

The spelling of 63465881 in words is "sixty-three million, four hundred sixty-five thousand, eight hundred eighty-one".