983428991 has 8 divisors (see below), whose sum is σ = 990349824. Its totient is φ = 976527360.

The previous prime is 983428967. The next prime is 983428997. The reversal of 983428991 is 199824389.

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 983428991 - 2¹⁰ = 983427967 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 (983428997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106946 + ... + 115776.

It is an arithmetic number, because the mean of its divisors is an integer number (123793728).

Almost surely, 2^983428991 is an apocalyptic number.

983428991 is a deficient number, since it is larger than the sum of its proper divisors (6920833).

983428991 is a wasteful number, since it uses less digits than its factorization.

983428991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9601.

The product of its digits is 1119744, while the sum is 53.

The square root of 983428991 is about 31359.6714109061. The cubic root of 983428991 is about 994.4455353784.

The spelling of 983428991 in words is "nine hundred eighty-three million, four hundred twenty-eight thousand, nine hundred ninety-one".