87810851 has 2 divisors, whose sum is σ = 87810852. Its totient is φ = 87810850.

The previous prime is 87810841. The next prime is 87810857. The reversal of 87810851 is 15801878.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87810851 - 2⁶ = 87810787 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87810857) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43905425 + 43905426.

It is an arithmetic number, because the mean of its divisors is an integer number (43905426).

Almost surely, 2^87810851 is an apocalyptic number.

87810851 is a deficient number, since it is larger than the sum of its proper divisors (1).

87810851 is an equidigital number, since it uses as much as digits as its factorization.

87810851 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17920, while the sum is 38.

The square root of 87810851 is about 9370.7444208024. The cubic root of 87810851 is about 444.4771049586.

The spelling of 87810851 in words is "eighty-seven million, eight hundred ten thousand, eight hundred fifty-one".