867021542873 has 2 divisors, whose sum is σ = 867021542874. Its totient is φ = 867021542872.

The previous prime is 867021542869. The next prime is 867021542879. The reversal of 867021542873 is 378245120768.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 824458552009 + 42562990864 = 907997^2 + 206308^2 .

It is a cyclic number.

It is not a de Polignac number, because 867021542873 - 2² = 867021542869 is a prime.

It is not a weakly prime, because it can be changed into another prime (867021542879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433510771436 + 433510771437.

It is an arithmetic number, because the mean of its divisors is an integer number (433510771437).

Almost surely, 2^867021542873 is an apocalyptic number.

It is an amenable number.

867021542873 is a deficient number, since it is larger than the sum of its proper divisors (1).

867021542873 is an equidigital number, since it uses as much as digits as its factorization.

867021542873 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4515840, while the sum is 53.

The spelling of 867021542873 in words is "eight hundred sixty-seven billion, twenty-one million, five hundred forty-two thousand, eight hundred seventy-three".