42147609787 has 2 divisors, whose sum is σ = 42147609788. Its totient is φ = 42147609786.

The previous prime is 42147609743. The next prime is 42147609821. The reversal of 42147609787 is 78790674124.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42147609787 - 2⁷ = 42147609659 is a prime.

It is not a weakly prime, because it can be changed into another prime (42147601787) 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, 21073804893 + 21073804894.

It is an arithmetic number, because the mean of its divisors is an integer number (21073804894).

Almost surely, 2^42147609787 is an apocalyptic number.

42147609787 is a deficient number, since it is larger than the sum of its proper divisors (1).

42147609787 is an equidigital number, since it uses as much as digits as its factorization.

42147609787 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4741632, while the sum is 55.

The spelling of 42147609787 in words is "forty-two billion, one hundred forty-seven million, six hundred nine thousand, seven hundred eighty-seven".