845638867 has 2 divisors, whose sum is σ = 845638868. Its totient is φ = 845638866.

The previous prime is 845638847. The next prime is 845638873. The reversal of 845638867 is 768836548.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 845638867 - 2²³ = 837250259 is a prime.

It is a super-3 number, since 3×845638867³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (845638847) 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, 422819433 + 422819434.

It is an arithmetic number, because the mean of its divisors is an integer number (422819434).

Almost surely, 2^845638867 is an apocalyptic number.

845638867 is a deficient number, since it is larger than the sum of its proper divisors (1).

845638867 is an equidigital number, since it uses as much as digits as its factorization.

845638867 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7741440, while the sum is 55.

The square root of 845638867 is about 29079.8704777033. The cubic root of 845638867 is about 945.6453947188.

The spelling of 845638867 in words is "eight hundred forty-five million, six hundred thirty-eight thousand, eight hundred sixty-seven".