42216679 has 2 divisors, whose sum is σ = 42216680. Its totient is φ = 42216678.

The previous prime is 42216659. The next prime is 42216709. The reversal of 42216679 is 97661224.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42216679 - 2¹³ = 42208487 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42216649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21108339 + 21108340.

It is an arithmetic number, because the mean of its divisors is an integer number (21108340).

Almost surely, 2^42216679 is an apocalyptic number.

42216679 is a deficient number, since it is larger than the sum of its proper divisors (1).

42216679 is an equidigital number, since it uses as much as digits as its factorization.

42216679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 36288, while the sum is 37.

The square root of 42216679 is about 6497.4363405885. The cubic root of 42216679 is about 348.1994029403.

The spelling of 42216679 in words is "forty-two million, two hundred sixteen thousand, six hundred seventy-nine".