63497381 has 2 divisors, whose sum is σ = 63497382. Its totient is φ = 63497380.

The previous prime is 63497353. The next prime is 63497383. The reversal of 63497381 is 18379436.

63497381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 55741156 + 7756225 = 7466^2 + 2785^2 .

It is a cyclic number.

It is not a de Polignac number, because 63497381 - 2²² = 59303077 is a prime.

It is a super-2 number, since 2×63497381² = 8063834787718322, which contains 22 as substring.

Together with 63497383, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63497383) 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, 31748690 + 31748691.

It is an arithmetic number, because the mean of its divisors is an integer number (31748691).

Almost surely, 2^63497381 is an apocalyptic number.

It is an amenable number.

63497381 is a deficient number, since it is larger than the sum of its proper divisors (1).

63497381 is an equidigital number, since it uses as much as digits as its factorization.

63497381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 108864, while the sum is 41.

The square root of 63497381 is about 7968.5243928848. The cubic root of 63497381 is about 398.9501238946.

The spelling of 63497381 in words is "sixty-three million, four hundred ninety-seven thousand, three hundred eighty-one".