87198269 has 2 divisors, whose sum is σ = 87198270. Its totient is φ = 87198268.

The previous prime is 87198229. The next prime is 87198311. The reversal of 87198269 is 96289178.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87198244 + 25 = 9338^2 + 5^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87198269 is a prime.

It is a super-2 number, since 2×87198269² = 15207076233192722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87198229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43599134 + 43599135.

It is an arithmetic number, because the mean of its divisors is an integer number (43599135).

Almost surely, 2^87198269 is an apocalyptic number.

It is an amenable number.

87198269 is a deficient number, since it is larger than the sum of its proper divisors (1).

87198269 is an equidigital number, since it uses as much as digits as its factorization.

87198269 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 435456, while the sum is 50.

The square root of 87198269 is about 9338.0013386163. The cubic root of 87198269 is about 443.4411119169.

Subtracting 87198269 from its reverse (96289178), we obtain a palindrome (9090909).

The spelling of 87198269 in words is "eighty-seven million, one hundred ninety-eight thousand, two hundred sixty-nine".