42219377 has 2 divisors, whose sum is σ = 42219378. Its totient is φ = 42219376.

The previous prime is 42219263. The next prime is 42219379. The reversal of 42219377 is 77391224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 22363441 + 19855936 = 4729^2 + 4456^2 .

It is a cyclic number.

It is not a de Polignac number, because 42219377 - 2¹⁰ = 42218353 is a prime.

Together with 42219379, 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 (42219379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21109688 + 21109689.

It is an arithmetic number, because the mean of its divisors is an integer number (21109689).

Almost surely, 2^42219377 is an apocalyptic number.

It is an amenable number.

42219377 is a deficient number, since it is larger than the sum of its proper divisors (1).

42219377 is an equidigital number, since it uses as much as digits as its factorization.

42219377 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21168, while the sum is 35.

The square root of 42219377 is about 6497.6439576203. The cubic root of 42219377 is about 348.2068204034.

The spelling of 42219377 in words is "forty-two million, two hundred nineteen thousand, three hundred seventy-seven".