42906443 has 2 divisors, whose sum is σ = 42906444. Its totient is φ = 42906442.

The previous prime is 42906379. The next prime is 42906463. The reversal of 42906443 is 34460924.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42906443 - 2⁶ = 42906379 is a prime.

It is a Chen prime.

It is equal to p_2599232 and since 42906443 and 2599232 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42906463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21453221 + 21453222.

It is an arithmetic number, because the mean of its divisors is an integer number (21453222).

Almost surely, 2^42906443 is an apocalyptic number.

42906443 is a deficient number, since it is larger than the sum of its proper divisors (1).

42906443 is an equidigital number, since it uses as much as digits as its factorization.

42906443 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 20736, while the sum is 32.

The square root of 42906443 is about 6550.3009854510. The cubic root of 42906443 is about 350.0855382768.

The spelling of 42906443 in words is "forty-two million, nine hundred six thousand, four hundred forty-three".