800121187 has 2 divisors, whose sum is σ = 800121188. Its totient is φ = 800121186.

The previous prime is 800121151. The next prime is 800121211. The reversal of 800121187 is 781121008.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 800121187 - 2⁷ = 800121059 is a prime.

It is not a weakly prime, because it can be changed into another prime (800121137) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 400060593 + 400060594.

It is an arithmetic number, because the mean of its divisors is an integer number (400060594).

Almost surely, 2^800121187 is an apocalyptic number.

800121187 is a deficient number, since it is larger than the sum of its proper divisors (1).

800121187 is an equidigital number, since it uses as much as digits as its factorization.

800121187 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 896, while the sum is 28.

The square root of 800121187 is about 28286.4134700743. The cubic root of 800121187 is about 928.3646393747.

The spelling of 800121187 in words is "eight hundred million, one hundred twenty-one thousand, one hundred eighty-seven".