42683639 has 2 divisors, whose sum is σ = 42683640. Its totient is φ = 42683638.

The previous prime is 42683587. The next prime is 42683647. The reversal of 42683639 is 93638624.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 42683639 - 2⁸ = 42683383 is a prime.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 42683596 and 42683605.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42683689) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21341819 + 21341820.

It is an arithmetic number, because the mean of its divisors is an integer number (21341820).

Almost surely, 2^42683639 is an apocalyptic number.

42683639 is a deficient number, since it is larger than the sum of its proper divisors (1).

42683639 is an equidigital number, since it uses as much as digits as its factorization.

42683639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 186624, while the sum is 41.

The square root of 42683639 is about 6533.2716918861. The cubic root of 42683639 is about 349.4785131861.

The spelling of 42683639 in words is "forty-two million, six hundred eighty-three thousand, six hundred thirty-nine".