42847799123 has 2 divisors, whose sum is σ = 42847799124. Its totient is φ = 42847799122.

The previous prime is 42847799021. The next prime is 42847799129. The reversal of 42847799123 is 32199774824.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42847799123 - 2⁸ = 42847798867 is a prime.

It is not a weakly prime, because it can be changed into another prime (42847799129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21423899561 + 21423899562.

It is an arithmetic number, because the mean of its divisors is an integer number (21423899562).

Almost surely, 2^42847799123 is an apocalyptic number.

42847799123 is a deficient number, since it is larger than the sum of its proper divisors (1).

42847799123 is an equidigital number, since it uses as much as digits as its factorization.

42847799123 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6096384, while the sum is 56.

The spelling of 42847799123 in words is "forty-two billion, eight hundred forty-seven million, seven hundred ninety-nine thousand, one hundred twenty-three".