42206347 has 2 divisors, whose sum is σ = 42206348. Its totient is φ = 42206346.

The previous prime is 42206341. The next prime is 42206363. The reversal of 42206347 is 74360224.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42206347 is a prime.

It is not a weakly prime, because it can be changed into another prime (42206341) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21103173 + 21103174.

It is an arithmetic number, because the mean of its divisors is an integer number (21103174).

Almost surely, 2^42206347 is an apocalyptic number.

42206347 is a deficient number, since it is larger than the sum of its proper divisors (1).

42206347 is an equidigital number, since it uses as much as digits as its factorization.

42206347 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 42206347 is about 6496.6412091172. The cubic root of 42206347 is about 348.1709948178.

The spelling of 42206347 in words is "forty-two million, two hundred six thousand, three hundred forty-seven".