42387949663 has 2 divisors, whose sum is σ = 42387949664. Its totient is φ = 42387949662.

The previous prime is 42387949621. The next prime is 42387949691. The reversal of 42387949663 is 36694978324.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42387949663 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42387949363) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21193974831 + 21193974832.

It is an arithmetic number, because the mean of its divisors is an integer number (21193974832).

Almost surely, 2^42387949663 is an apocalyptic number.

42387949663 is a deficient number, since it is larger than the sum of its proper divisors (1).

42387949663 is an equidigital number, since it uses as much as digits as its factorization.

42387949663 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 47029248, while the sum is 61.

The spelling of 42387949663 in words is "forty-two billion, three hundred eighty-seven million, nine hundred forty-nine thousand, six hundred sixty-three".