845641187 has 2 divisors, whose sum is σ = 845641188. Its totient is φ = 845641186.

The previous prime is 845641141. The next prime is 845641211. The reversal of 845641187 is 781146548.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-845641187 is a prime.

It is a super-3 number, since 3×845641187³ (a number of 28 digits) contains 333 as substring.

It is not a weakly prime, because it can be changed into another prime (845641087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 422820593 + 422820594.

It is an arithmetic number, because the mean of its divisors is an integer number (422820594).

Almost surely, 2^845641187 is an apocalyptic number.

845641187 is a deficient number, since it is larger than the sum of its proper divisors (1).

845641187 is an equidigital number, since it uses as much as digits as its factorization.

845641187 is an evil number, because the sum of its binary digits is even.

The product of its digits is 215040, while the sum is 44.

The square root of 845641187 is about 29079.9103678123. The cubic root of 845641187 is about 945.6462595069.

The spelling of 845641187 in words is "eight hundred forty-five million, six hundred forty-one thousand, one hundred eighty-seven".