42220697 has 2 divisors, whose sum is σ = 42220698. Its totient is φ = 42220696.

The previous prime is 42220691. The next prime is 42220699. The reversal of 42220697 is 79602224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42133081 + 87616 = 6491^2 + 296^2 .

It is a cyclic number.

It is not a de Polignac number, because 42220697 - 2¹⁰ = 42219673 is a prime.

Together with 42220699, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (42220691) 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, 21110348 + 21110349.

It is an arithmetic number, because the mean of its divisors is an integer number (21110349).

Almost surely, 2^42220697 is an apocalyptic number.

It is an amenable number.

42220697 is a deficient number, since it is larger than the sum of its proper divisors (1).

42220697 is an equidigital number, since it uses as much as digits as its factorization.

42220697 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 42220697 is about 6497.7455321057. The cubic root of 42220697 is about 348.2104492917.

The spelling of 42220697 in words is "forty-two million, two hundred twenty thousand, six hundred ninety-seven".