87780199 has 8 divisors (see below), whose sum is σ = 94706640. Its totient is φ = 80878656.

The previous prime is 87780193. The next prime is 87780223. The reversal of 87780199 is 99108778.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87780199 - 2¹¹ = 87778151 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87780193) 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 in 7 ways as a sum of consecutive naturals, for example, 1464 + ... + 13330.

It is an arithmetic number, because the mean of its divisors is an integer number (11838330).

Almost surely, 2^87780199 is an apocalyptic number.

87780199 is a deficient number, since it is larger than the sum of its proper divisors (6926441).

87780199 is a wasteful number, since it uses less digits than its factorization.

87780199 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12449.

The product of its (nonzero) digits is 254016, while the sum is 49.

The square root of 87780199 is about 9369.1087623103. The cubic root of 87780199 is about 444.4253812911.

The spelling of 87780199 in words is "eighty-seven million, seven hundred eighty thousand, one hundred ninety-nine".