42239129923 has 2 divisors, whose sum is σ = 42239129924. Its totient is φ = 42239129922.

The previous prime is 42239129897. The next prime is 42239129939. The reversal of 42239129923 is 32992193224.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42239129923 - 2³³ = 33649195331 is a prime.

It is not a weakly prime, because it can be changed into another prime (42239129423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21119564961 + 21119564962.

It is an arithmetic number, because the mean of its divisors is an integer number (21119564962).

Almost surely, 2^42239129923 is an apocalyptic number.

42239129923 is a deficient number, since it is larger than the sum of its proper divisors (1).

42239129923 is an equidigital number, since it uses as much as digits as its factorization.

42239129923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 419904, while the sum is 46.

The spelling of 42239129923 in words is "forty-two billion, two hundred thirty-nine million, one hundred twenty-nine thousand, nine hundred twenty-three".