87198229 has 2 divisors, whose sum is σ = 87198230. Its totient is φ = 87198228.

The previous prime is 87198217. The next prime is 87198269. The reversal of 87198229 is 92289178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 78730129 + 8468100 = 8873^2 + 2910^2 .

It is a cyclic number.

It is not a de Polignac number, because 87198229 - 2⁷ = 87198101 is a prime.

It is a super-2 number, since 2×87198229² = 15207062281472882, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87198269) 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, 43599114 + 43599115.

It is an arithmetic number, because the mean of its divisors is an integer number (43599115).

Almost surely, 2^87198229 is an apocalyptic number.

It is an amenable number.

87198229 is a deficient number, since it is larger than the sum of its proper divisors (1).

87198229 is an equidigital number, since it uses as much as digits as its factorization.

87198229 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 145152, while the sum is 46.

The square root of 87198229 is about 9337.9991968301. Note that the first 3 decimals coincide. The cubic root of 87198229 is about 443.4410441111.

The spelling of 87198229 in words is "eighty-seven million, one hundred ninety-eight thousand, two hundred twenty-nine".