63491683 has 2 divisors, whose sum is σ = 63491684. Its totient is φ = 63491682.

The previous prime is 63491671. The next prime is 63491699. The reversal of 63491683 is 38619436.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-63491683 is a prime.

It is not a weakly prime, because it can be changed into another prime (63491383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31745841 + 31745842.

It is an arithmetic number, because the mean of its divisors is an integer number (31745842).

Almost surely, 2^63491683 is an apocalyptic number.

63491683 is a deficient number, since it is larger than the sum of its proper divisors (1).

63491683 is an equidigital number, since it uses as much as digits as its factorization.

63491683 is an evil number, because the sum of its binary digits is even.

The product of its digits is 93312, while the sum is 40.

The square root of 63491683 is about 7968.1668531727. The cubic root of 63491683 is about 398.9381901436.

The spelling of 63491683 in words is "sixty-three million, four hundred ninety-one thousand, six hundred eighty-three".