842137169 has 2 divisors, whose sum is σ = 842137170. Its totient is φ = 842137168.

The previous prime is 842137129. The next prime is 842137181. The reversal of 842137169 is 961731248.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 763140625 + 78996544 = 27625^2 + 8888^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-842137169 is a prime.

It is a super-2 number, since 2×842137169² = 1418390022822669122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (842137129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421068584 + 421068585.

It is an arithmetic number, because the mean of its divisors is an integer number (421068585).

Almost surely, 2^842137169 is an apocalyptic number.

It is an amenable number.

842137169 is a deficient number, since it is larger than the sum of its proper divisors (1).

842137169 is an equidigital number, since it uses as much as digits as its factorization.

842137169 is an evil number, because the sum of its binary digits is even.

The product of its digits is 72576, while the sum is 41.

The square root of 842137169 is about 29019.5997387972. The cubic root of 842137169 is about 944.3383175385.

The spelling of 842137169 in words is "eight hundred forty-two million, one hundred thirty-seven thousand, one hundred sixty-nine".