183980987 has 4 divisors (see below), whose sum is σ = 194803416. Its totient is φ = 173158560.

The previous prime is 183980891. The next prime is 183980989. The reversal of 183980987 is 789089381.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 183980987 - 2¹⁰ = 183979963 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (183980989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5411189 + ... + 5411222.

It is an arithmetic number, because the mean of its divisors is an integer number (48700854).

Almost surely, 2^183980987 is an apocalyptic number.

183980987 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

183980987 is a deficient number, since it is larger than the sum of its proper divisors (10822429).

183980987 is a wasteful number, since it uses less digits than its factorization.

183980987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10822428.

The product of its (nonzero) digits is 870912, while the sum is 53.

The square root of 183980987 is about 13563.9591196671. The cubic root of 183980987 is about 568.7538045553.

The spelling of 183980987 in words is "one hundred eighty-three million, nine hundred eighty thousand, nine hundred eighty-seven".