867012409 has 2 divisors, whose sum is σ = 867012410. Its totient is φ = 867012408.

The previous prime is 867012343. The next prime is 867012437. The reversal of 867012409 is 904210768.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 825125625 + 41886784 = 28725^2 + 6472^2 .

It is a cyclic number.

It is not a de Polignac number, because 867012409 - 2⁹ = 867011897 is a prime.

It is equal to p_44408539 and since 867012409 and 44408539 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (867012469) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 433506204 + 433506205.

It is an arithmetic number, because the mean of its divisors is an integer number (433506205).

Almost surely, 2^867012409 is an apocalyptic number.

It is an amenable number.

867012409 is a deficient number, since it is larger than the sum of its proper divisors (1).

867012409 is an equidigital number, since it uses as much as digits as its factorization.

867012409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 867012409 is about 29445.0744437843. The cubic root of 867012409 is about 953.5462687861.

The spelling of 867012409 in words is "eight hundred sixty-seven million, twelve thousand, four hundred nine".