42919941887 has 2 divisors, whose sum is σ = 42919941888. Its totient is φ = 42919941886.

The previous prime is 42919941881. The next prime is 42919941943. The reversal of 42919941887 is 78814991924.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42919941887 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42919941881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21459970943 + 21459970944.

It is an arithmetic number, because the mean of its divisors is an integer number (21459970944).

Almost surely, 2^42919941887 is an apocalyptic number.

42919941887 is a deficient number, since it is larger than the sum of its proper divisors (1).

42919941887 is an equidigital number, since it uses as much as digits as its factorization.

42919941887 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10450944, while the sum is 62.

The spelling of 42919941887 in words is "forty-two billion, nine hundred nineteen million, nine hundred forty-one thousand, eight hundred eighty-seven".