842156377 has 2 divisors, whose sum is σ = 842156378. Its totient is φ = 842156376.

The previous prime is 842156369. The next prime is 842156411. The reversal of 842156377 is 773651248.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 824608656 + 17547721 = 28716^2 + 4189^2 .

It is a cyclic number.

It is not a de Polignac number, because 842156377 - 2³ = 842156369 is a prime.

It is a super-2 number, since 2×842156377² = 1418454726643532258, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (842156327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421078188 + 421078189.

It is an arithmetic number, because the mean of its divisors is an integer number (421078189).

Almost surely, 2^842156377 is an apocalyptic number.

It is an amenable number.

842156377 is a deficient number, since it is larger than the sum of its proper divisors (1).

842156377 is an equidigital number, since it uses as much as digits as its factorization.

842156377 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 282240, while the sum is 43.

The square root of 842156377 is about 29019.9306856512. The cubic root of 842156377 is about 944.3454971735.

The spelling of 842156377 in words is "eight hundred forty-two million, one hundred fifty-six thousand, three hundred seventy-seven".