42431923 has 2 divisors, whose sum is σ = 42431924. Its totient is φ = 42431922.

The previous prime is 42431911. The next prime is 42431947. The reversal of 42431923 is 32913424.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42431923 - 2¹⁷ = 42300851 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 42431891 and 42431900.

It is not a weakly prime, because it can be changed into another prime (42431723) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21215961 + 21215962.

It is an arithmetic number, because the mean of its divisors is an integer number (21215962).

Almost surely, 2^42431923 is an apocalyptic number.

42431923 is a deficient number, since it is larger than the sum of its proper divisors (1).

42431923 is an equidigital number, since it uses as much as digits as its factorization.

42431923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5184, while the sum is 28.

The square root of 42431923 is about 6513.9790450999. The cubic root of 42431923 is about 348.7901711583.

The spelling of 42431923 in words is "forty-two million, four hundred thirty-one thousand, nine hundred twenty-three".