42623443 has 2 divisors, whose sum is σ = 42623444. Its totient is φ = 42623442.

The previous prime is 42623431. The next prime is 42623447. The reversal of 42623443 is 34432624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42623443 - 2⁵ = 42623411 is a prime.

It is not a weakly prime, because it can be changed into another prime (42623447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21311721 + 21311722.

It is an arithmetic number, because the mean of its divisors is an integer number (21311722).

Almost surely, 2^42623443 is an apocalyptic number.

42623443 is a deficient number, since it is larger than the sum of its proper divisors (1).

42623443 is an equidigital number, since it uses as much as digits as its factorization.

42623443 is an evil number, because the sum of its binary digits is even.

The product of its digits is 13824, while the sum is 28.

The square root of 42623443 is about 6528.6631862886. The cubic root of 42623443 is about 349.3141480547.

The spelling of 42623443 in words is "forty-two million, six hundred twenty-three thousand, four hundred forty-three".