842157267197 has 2 divisors, whose sum is σ = 842157267198. Its totient is φ = 842157267196.

The previous prime is 842157267187. The next prime is 842157267221. The reversal of 842157267197 is 791762751248.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 669943887001 + 172213380196 = 818501^2 + 414986^2 .

It is a cyclic number.

It is not a de Polignac number, because 842157267197 - 2⁴ = 842157267181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (842157267187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 421078633598 + 421078633599.

It is an arithmetic number, because the mean of its divisors is an integer number (421078633599).

Almost surely, 2^842157267197 is an apocalyptic number.

It is an amenable number.

842157267197 is a deficient number, since it is larger than the sum of its proper divisors (1).

842157267197 is an equidigital number, since it uses as much as digits as its factorization.

842157267197 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 11854080, while the sum is 59.

The spelling of 842157267197 in words is "eight hundred forty-two billion, one hundred fifty-seven million, two hundred sixty-seven thousand, one hundred ninety-seven".