63540443 has 2 divisors, whose sum is σ = 63540444. Its totient is φ = 63540442.

The previous prime is 63540409. The next prime is 63540457. The reversal of 63540443 is 34404536.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63540443 - 2¹⁴ = 63524059 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (63540403) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31770221 + 31770222.

It is an arithmetic number, because the mean of its divisors is an integer number (31770222).

Almost surely, 2^63540443 is an apocalyptic number.

63540443 is a deficient number, since it is larger than the sum of its proper divisors (1).

63540443 is an equidigital number, since it uses as much as digits as its factorization.

63540443 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17280, while the sum is 29.

The square root of 63540443 is about 7971.2259408450. The cubic root of 63540443 is about 399.0402888110.

Adding to 63540443 its reverse (34404536), we get a palindrome (97944979).

It can be divided in two parts, 635404 and 43, that multiplied together give a palindrome (27322372).

The spelling of 63540443 in words is "sixty-three million, five hundred forty thousand, four hundred forty-three".