87969199 has 2 divisors, whose sum is σ = 87969200. Its totient is φ = 87969198.

The previous prime is 87969197. The next prime is 87969223. The reversal of 87969199 is 99196978.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87969199 - 2¹ = 87969197 is a prime.

Together with 87969197, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87969197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43984599 + 43984600.

It is an arithmetic number, because the mean of its divisors is an integer number (43984600).

Almost surely, 2^87969199 is an apocalyptic number.

87969199 is a deficient number, since it is larger than the sum of its proper divisors (1).

87969199 is an equidigital number, since it uses as much as digits as its factorization.

87969199 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2204496, while the sum is 58.

The square root of 87969199 is about 9379.1896771523. The cubic root of 87969199 is about 444.7441175045.

The spelling of 87969199 in words is "eighty-seven million, nine hundred sixty-nine thousand, one hundred ninety-nine".