867856973 has 2 divisors, whose sum is σ = 867856974. Its totient is φ = 867856972.

The previous prime is 867856967. The next prime is 867856993. The reversal of 867856973 is 379658768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 866595844 + 1261129 = 29438^2 + 1123^2 .

It is a cyclic number.

It is not a de Polignac number, because 867856973 - 2¹⁸ = 867594829 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (867856903) 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, 433928486 + 433928487.

It is an arithmetic number, because the mean of its divisors is an integer number (433928487).

Almost surely, 2^867856973 is an apocalyptic number.

It is an amenable number.

867856973 is a deficient number, since it is larger than the sum of its proper divisors (1).

867856973 is an equidigital number, since it uses as much as digits as its factorization.

867856973 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15240960, while the sum is 59.

The square root of 867856973 is about 29459.4122989580. The cubic root of 867856973 is about 953.8557874239.

The spelling of 867856973 in words is "eight hundred sixty-seven million, eight hundred fifty-six thousand, nine hundred seventy-three".