842941397 has 2 divisors, whose sum is σ = 842941398. Its totient is φ = 842941396.

The previous prime is 842941313. The next prime is 842941423. The reversal of 842941397 is 793149248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 840942001 + 1999396 = 28999^2 + 1414^2 .

It is a cyclic number.

It is not a de Polignac number, because 842941397 - 2²² = 838747093 is a prime.

It is a super-3 number, since 3×842941397³ (a number of 28 digits) contains 333 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842941997) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421470698 + 421470699.

It is an arithmetic number, because the mean of its divisors is an integer number (421470699).

Almost surely, 2^842941397 is an apocalyptic number.

It is an amenable number.

842941397 is a deficient number, since it is larger than the sum of its proper divisors (1).

842941397 is an equidigital number, since it uses as much as digits as its factorization.

842941397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 435456, while the sum is 47.

The square root of 842941397 is about 29033.4530671086. The cubic root of 842941397 is about 944.6388314033.

The spelling of 842941397 in words is "eight hundred forty-two million, nine hundred forty-one thousand, three hundred ninety-seven".