63544381 has 2 divisors, whose sum is σ = 63544382. Its totient is φ = 63544380.

The previous prime is 63544367. The next prime is 63544391. The reversal of 63544381 is 18344536.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58660281 + 4884100 = 7659^2 + 2210^2 .

It is a cyclic number.

It is not a de Polignac number, because 63544381 - 2⁹ = 63543869 is a prime.

It is a super-2 number, since 2×63544381² = 8075776713346322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63544391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31772190 + 31772191.

It is an arithmetic number, because the mean of its divisors is an integer number (31772191).

Almost surely, 2^63544381 is an apocalyptic number.

It is an amenable number.

63544381 is a deficient number, since it is larger than the sum of its proper divisors (1).

63544381 is an equidigital number, since it uses as much as digits as its factorization.

63544381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34560, while the sum is 34.

The square root of 63544381 is about 7971.4729504653. The cubic root of 63544381 is about 399.0485323176.

The spelling of 63544381 in words is "sixty-three million, five hundred forty-four thousand, three hundred eighty-one".