42906043723 has 2 divisors, whose sum is σ = 42906043724. Its totient is φ = 42906043722.

The previous prime is 42906043717. The next prime is 42906043777. The reversal of 42906043723 is 32734060924.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42906043723 - 2²⁵ = 42872489291 is a prime.

It is not a weakly prime, because it can be changed into another prime (42906043123) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21453021861 + 21453021862.

It is an arithmetic number, because the mean of its divisors is an integer number (21453021862).

Almost surely, 2^42906043723 is an apocalyptic number.

42906043723 is a deficient number, since it is larger than the sum of its proper divisors (1).

42906043723 is an equidigital number, since it uses as much as digits as its factorization.

42906043723 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 217728, while the sum is 40.

The spelling of 42906043723 in words is "forty-two billion, nine hundred six million, forty-three thousand, seven hundred twenty-three".