829699489 has 4 divisors (see below), whose sum is σ = 829774660. Its totient is φ = 829624320.

The previous prime is 829699487. The next prime is 829699499. The reversal of 829699489 is 984996928.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 521345889 + 308353600 = 22833^2 + 17560^2 .

It is a cyclic number.

It is not a de Polignac number, because 829699489 - 2¹ = 829699487 is a prime.

It is a super-2 number, since 2×829699489² = 1376802484093722242, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 829699489.

It is not an unprimeable number, because it can be changed into a prime (829699487) 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, 17424 + ... + 44305.

It is an arithmetic number, because the mean of its divisors is an integer number (207443665).

Almost surely, 2^829699489 is an apocalyptic number.

It is an amenable number.

829699489 is a deficient number, since it is larger than the sum of its proper divisors (75171).

829699489 is a wasteful number, since it uses less digits than its factorization.

829699489 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75170.

The product of its digits is 20155392, while the sum is 64.

The square root of 829699489 is about 28804.5046650693. The cubic root of 829699489 is about 939.6662044795. Note that the first 3 decimals are identical.

The spelling of 829699489 in words is "eight hundred twenty-nine million, six hundred ninety-nine thousand, four hundred eighty-nine".