811012987 has 2 divisors, whose sum is σ = 811012988. Its totient is φ = 811012986.

The previous prime is 811012963. The next prime is 811013017. The reversal of 811012987 is 789210118.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 811012987 - 2¹⁹ = 810488699 is a prime.

It is a Chen prime.

811012987 is a modest number, since divided by 12987 gives 811 as remainder.

It is equal to p_41683654 and since 811012987 and 41683654 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 (811012487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405506493 + 405506494.

It is an arithmetic number, because the mean of its divisors is an integer number (405506494).

Almost surely, 2^811012987 is an apocalyptic number.

811012987 is a deficient number, since it is larger than the sum of its proper divisors (1).

811012987 is an equidigital number, since it uses as much as digits as its factorization.

811012987 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8064, while the sum is 37.

The square root of 811012987 is about 28478.2897485084. The cubic root of 811012987 is about 932.5581807887.

The spelling of 811012987 in words is "eight hundred eleven million, twelve thousand, nine hundred eighty-seven".