87909799 has 2 divisors, whose sum is σ = 87909800. Its totient is φ = 87909798.

The previous prime is 87909797. The next prime is 87909821. The reversal of 87909799 is 99790978.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87909799 - 2¹ = 87909797 is a prime.

Together with 87909797, 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 (87909793) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43954899 + 43954900.

It is an arithmetic number, because the mean of its divisors is an integer number (43954900).

Almost surely, 2^87909799 is an apocalyptic number.

87909799 is a deficient number, since it is larger than the sum of its proper divisors (1).

87909799 is an equidigital number, since it uses as much as digits as its factorization.

87909799 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2571912, while the sum is 58.

The square root of 87909799 is about 9376.0225575667. The cubic root of 87909799 is about 444.6439925017.

The spelling of 87909799 in words is "eighty-seven million, nine hundred nine thousand, seven hundred ninety-nine".