87210113 has 2 divisors, whose sum is σ = 87210114. Its totient is φ = 87210112.

The previous prime is 87210091. The next prime is 87210169. The reversal of 87210113 is 31101278.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63170704 + 24039409 = 7948^2 + 4903^2 .

It is a cyclic number.

It is not a de Polignac number, because 87210113 - 2⁶ = 87210049 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is equal to p_5064710 and since 87210113 and 5064710 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 (87210173) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43605056 + 43605057.

It is an arithmetic number, because the mean of its divisors is an integer number (43605057).

Almost surely, 2^87210113 is an apocalyptic number.

It is an amenable number.

87210113 is a deficient number, since it is larger than the sum of its proper divisors (1).

87210113 is an equidigital number, since it uses as much as digits as its factorization.

87210113 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 23.

The square root of 87210113 is about 9338.6354999004. The cubic root of 87210113 is about 443.4611883045.

The spelling of 87210113 in words is "eighty-seven million, two hundred ten thousand, one hundred thirteen".