867655897 has 2 divisors, whose sum is σ = 867655898. Its totient is φ = 867655896.

The previous prime is 867655879. The next prime is 867655907. The reversal of 867655897 is 798556768.

Together with previous prime (867655879) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 706974921 + 160680976 = 26589^2 + 12676^2 .

It is a cyclic number.

It is not a de Polignac number, because 867655897 - 2¹⁹ = 867131609 is a prime.

It is not a weakly prime, because it can be changed into another prime (867655847) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433827948 + 433827949.

It is an arithmetic number, because the mean of its divisors is an integer number (433827949).

Almost surely, 2^867655897 is an apocalyptic number.

It is an amenable number.

867655897 is a deficient number, since it is larger than the sum of its proper divisors (1).

867655897 is an equidigital number, since it uses as much as digits as its factorization.

867655897 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25401600, while the sum is 61.

The square root of 867655897 is about 29455.9993379956. Note that the first 3 decimals coincide. The cubic root of 867655897 is about 953.7821146387.

The spelling of 867655897 in words is "eight hundred sixty-seven million, six hundred fifty-five thousand, eight hundred ninety-seven".