87985399 has 2 divisors, whose sum is σ = 87985400. Its totient is φ = 87985398.

The previous prime is 87985397. The next prime is 87985423. The reversal of 87985399 is 99358978.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87985399 - 2¹ = 87985397 is a prime.

Together with 87985397, 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 (87985393) 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, 43992699 + 43992700.

It is an arithmetic number, because the mean of its divisors is an integer number (43992700).

Almost surely, 2^87985399 is an apocalyptic number.

87985399 is a deficient number, since it is larger than the sum of its proper divisors (1).

87985399 is an equidigital number, since it uses as much as digits as its factorization.

87985399 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4898880, while the sum is 58.

The square root of 87985399 is about 9380.0532514480. The cubic root of 87985399 is about 444.7714165007.

The spelling of 87985399 in words is "eighty-seven million, nine hundred eighty-five thousand, three hundred ninety-nine".