1689332399 has 4 divisors (see below), whose sum is σ = 1693545600. Its totient is φ = 1685119200.

The previous prime is 1689332387. The next prime is 1689332413. The reversal of 1689332399 is 9932339861.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 9932339861 = 373 ⋅26628257.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1689332399 is a prime.

It is a super-2 number, since 2×1689332399² = 5707687908622190402, 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 1689332399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1689332329) 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, 2105999 + ... + 2106800.

It is an arithmetic number, because the mean of its divisors is an integer number (423386400).

Almost surely, 2^1689332399 is an apocalyptic number.

1689332399 is a deficient number, since it is larger than the sum of its proper divisors (4213201).

1689332399 is an equidigital number, since it uses as much as digits as its factorization.

1689332399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4213200.

The product of its digits is 1889568, while the sum is 53.

The square root of 1689332399 is about 41101.4890119567. The cubic root of 1689332399 is about 1190.9815593312.

The spelling of 1689332399 in words is "one billion, six hundred eighty-nine million, three hundred thirty-two thousand, three hundred ninety-nine".