42416639 has 2 divisors, whose sum is σ = 42416640. Its totient is φ = 42416638.

The previous prime is 42416629. The next prime is 42416641. The reversal of 42416639 is 93661424.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42416639 is a prime.

Together with 42416641, it forms a pair of twin primes.

It is a Chen prime.

It is a plaindrome in base 12.

It is a junction number, because it is equal to n+sod(n) for n = 42416599 and 42416608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42416609) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21208319 + 21208320.

It is an arithmetic number, because the mean of its divisors is an integer number (21208320).

Almost surely, 2^42416639 is an apocalyptic number.

42416639 is a deficient number, since it is larger than the sum of its proper divisors (1).

42416639 is an equidigital number, since it uses as much as digits as its factorization.

42416639 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 31104, while the sum is 35.

The square root of 42416639 is about 6512.8057701731. The cubic root of 42416639 is about 348.7482879975.

The spelling of 42416639 in words is "forty-two million, four hundred sixteen thousand, six hundred thirty-nine".