842238923 has 2 divisors, whose sum is σ = 842238924. Its totient is φ = 842238922.

The previous prime is 842238889. The next prime is 842238937. The reversal of 842238923 is 329832248.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 842238923 - 2²² = 838044619 is a prime.

It is not a weakly prime, because it can be changed into another prime (842238223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421119461 + 421119462.

It is an arithmetic number, because the mean of its divisors is an integer number (421119462).

Almost surely, 2^842238923 is an apocalyptic number.

842238923 is a deficient number, since it is larger than the sum of its proper divisors (1).

842238923 is an equidigital number, since it uses as much as digits as its factorization.

842238923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 165888, while the sum is 41.

The square root of 842238923 is about 29021.3528802501. The cubic root of 842238923 is about 944.3763502704.

The spelling of 842238923 in words is "eight hundred forty-two million, two hundred thirty-eight thousand, nine hundred twenty-three".