42919843 has 2 divisors, whose sum is σ = 42919844. Its totient is φ = 42919842.

The previous prime is 42919829. The next prime is 42919871. The reversal of 42919843 is 34891924.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42919843 - 2¹³ = 42911651 is a prime.

It is a super-2 number, since 2×42919843² = 3684225846289298, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 42919796 and 42919805.

It is not a weakly prime, because it can be changed into another prime (42919813) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21459921 + 21459922.

It is an arithmetic number, because the mean of its divisors is an integer number (21459922).

Almost surely, 2^42919843 is an apocalyptic number.

42919843 is a deficient number, since it is larger than the sum of its proper divisors (1).

42919843 is an equidigital number, since it uses as much as digits as its factorization.

42919843 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 62208, while the sum is 40.

The square root of 42919843 is about 6551.3237593634. The cubic root of 42919843 is about 350.1219792525.

The spelling of 42919843 in words is "forty-two million, nine hundred nineteen thousand, eight hundred forty-three".