42416389 has 2 divisors, whose sum is σ = 42416390. Its totient is φ = 42416388.

The previous prime is 42416351. The next prime is 42416449. The reversal of 42416389 is 98361424.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29757025 + 12659364 = 5455^2 + 3558^2 .

It is a cyclic number.

It is not a de Polignac number, because 42416389 - 2⁷ = 42416261 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42416329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21208194 + 21208195.

It is an arithmetic number, because the mean of its divisors is an integer number (21208195).

Almost surely, 2^42416389 is an apocalyptic number.

It is an amenable number.

42416389 is a deficient number, since it is larger than the sum of its proper divisors (1).

42416389 is an equidigital number, since it uses as much as digits as its factorization.

42416389 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 41472, while the sum is 37.

The square root of 42416389 is about 6512.7865771880. The cubic root of 42416389 is about 348.7476028321.

The spelling of 42416389 in words is "forty-two million, four hundred sixteen thousand, three hundred eighty-nine".