867421507 has 2 divisors, whose sum is σ = 867421508. Its totient is φ = 867421506.

The previous prime is 867421493. The next prime is 867421531. The reversal of 867421507 is 705124768.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 867421507 - 2¹¹ = 867419459 is a prime.

It is equal to p_44428567 and since 867421507 and 44428567 have the same sum of digits, it is a Honaker prime.

It is a self number, because there is not a number n which added to its sum of digits gives 867421507.

It is not a weakly prime, because it can be changed into another prime (867421537) 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, 433710753 + 433710754.

It is an arithmetic number, because the mean of its divisors is an integer number (433710754).

Almost surely, 2^867421507 is an apocalyptic number.

867421507 is a deficient number, since it is larger than the sum of its proper divisors (1).

867421507 is an equidigital number, since it uses as much as digits as its factorization.

867421507 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 867421507 is about 29452.0204230542. The cubic root of 867421507 is about 953.6962214775.

The spelling of 867421507 in words is "eight hundred sixty-seven million, four hundred twenty-one thousand, five hundred seven".