983981187 has 12 divisors (see below), whose sum is σ = 1624350000. Its totient is φ = 562274928.

The previous prime is 983981153. The next prime is 983981197. The reversal of 983981187 is 781189389.

983981187 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 983981187 - 2⁸ = 983980931 is a prime.

It is a Smith number, since the sum of its digits (54) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (983981197) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7809312 + ... + 7809437.

It is an arithmetic number, because the mean of its divisors is an integer number (135362500).

Almost surely, 2^983981187 is an apocalyptic number.

983981187 is a deficient number, since it is larger than the sum of its proper divisors (640368813).

983981187 is a wasteful number, since it uses less digits than its factorization.

983981187 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15618762 (or 15618759 counting only the distinct ones).

The product of its digits is 870912, while the sum is 54.

The square root of 983981187 is about 31368.4744130154. The cubic root of 983981187 is about 994.6316278179.

The spelling of 983981187 in words is "nine hundred eighty-three million, nine hundred eighty-one thousand, one hundred eighty-seven".