42378607123 has 2 divisors, whose sum is σ = 42378607124. Its totient is φ = 42378607122.

The previous prime is 42378607099. The next prime is 42378607153. The reversal of 42378607123 is 32170687324.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42378607123 - 2¹³ = 42378598931 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42378607123.

It is not a weakly prime, because it can be changed into another prime (42378607153) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21189303561 + 21189303562.

It is an arithmetic number, because the mean of its divisors is an integer number (21189303562).

Almost surely, 2^42378607123 is an apocalyptic number.

42378607123 is a deficient number, since it is larger than the sum of its proper divisors (1).

42378607123 is an equidigital number, since it uses as much as digits as its factorization.

42378607123 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 42378607123 in words is "forty-two billion, three hundred seventy-eight million, six hundred seven thousand, one hundred twenty-three".