828513993 has 8 divisors (see below), whose sum is σ = 1106379648. Its totient is φ = 551495504.

The previous prime is 828513991. The next prime is 828513997. The reversal of 828513993 is 399315828.

It is a happy number.

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 828513993 - 2¹ = 828513991 is a prime.

It is not an unprimeable number, because it can be changed into a prime (828513991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 209505 + ... + 213422.

It is an arithmetic number, because the mean of its divisors is an integer number (138297456).

Almost surely, 2^828513993 is an apocalyptic number.

It is an amenable number.

828513993 is a deficient number, since it is larger than the sum of its proper divisors (277865655).

828513993 is a wasteful number, since it uses less digits than its factorization.

828513993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423583.

The product of its digits is 466560, while the sum is 48.

The square root of 828513993 is about 28783.9190000250. The cubic root of 828513993 is about 939.2184513996.

The spelling of 828513993 in words is "eight hundred twenty-eight million, five hundred thirteen thousand, nine hundred ninety-three".