983428993 has 4 divisors (see below), whose sum is σ = 1007415108. Its totient is φ = 959442880.

The previous prime is 983428967. The next prime is 983428997. The reversal of 983428993 is 399824389.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 211033729 + 772395264 = 14527^2 + 27792^2 .

It is a cyclic number.

It is not a de Polignac number, because 983428993 - 2²⁹ = 446558081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (983428997) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11992996 + ... + 11993077.

It is an arithmetic number, because the mean of its divisors is an integer number (251853777).

Almost surely, 2^983428993 is an apocalyptic number.

It is an amenable number.

983428993 is a deficient number, since it is larger than the sum of its proper divisors (23986115).

983428993 is a wasteful number, since it uses less digits than its factorization.

983428993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23986114.

The product of its digits is 3359232, while the sum is 55.

The square root of 983428993 is about 31359.6714427942. The cubic root of 983428993 is about 994.4455360525.

The spelling of 983428993 in words is "nine hundred eighty-three million, four hundred twenty-eight thousand, nine hundred ninety-three".