42816929 has 2 divisors, whose sum is σ = 42816930. Its totient is φ = 42816928.

The previous prime is 42816923. The next prime is 42816941. The reversal of 42816929 is 92961824.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28376929 + 14440000 = 5327^2 + 3800^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-42816929 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42816923) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21408464 + 21408465.

It is an arithmetic number, because the mean of its divisors is an integer number (21408465).

Almost surely, 2^42816929 is an apocalyptic number.

It is an amenable number.

42816929 is a deficient number, since it is larger than the sum of its proper divisors (1).

42816929 is an equidigital number, since it uses as much as digits as its factorization.

42816929 is an evil number, because the sum of its binary digits is even.

The product of its digits is 62208, while the sum is 41.

The square root of 42816929 is about 6543.4646021813. The cubic root of 42816929 is about 349.8419122793.

The spelling of 42816929 in words is "forty-two million, eight hundred sixteen thousand, nine hundred twenty-nine".